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2011 Apex Supplement LIT 12618 02 97 .pdf


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FOREWORD
This Supplementary Service Manual has been prepared to introduce new service and new data for
the RX10PA, RX10PSA, RX10PXTA. For complete information, on service procedures, it is necessary to use this Supplementary Service Manual together with following manual:
RX10H, RX10SH, RX10MH, RX10MSH, RX10RH, RX10RSH SERVICE MANUAL:
8FA-28197-10 (LIT-12618-02-28)
RXW10J, RXW10SJ SUPPLEMENTARY SERVICE MANUAL:
8FG-28197-10 (LIT-12618-02-33)
RX10K, RX10RK, RX10RSK, RXW10K, RXW10SK, RX10MK, RX10MSK
SUPPLEMENTARY SERVICE MANUAL:
8FV-28197-10 (LIT-12618-02-39)
RX10RTL, RX10RL, RX10RTRL, RX10GTL, RXW10L, RX10ML
SUPPLEMENTARY SERVICE MANUAL:
8FS-28197-10 (LIT-12618-02-44)
RX10RTW, RX10RTRW, RXW10GTW, RX10MSW SUPPLEMENTARY SERVICE MANUAL:
8GY-28197-10 (LIT-12618-02-53)

RX10PA, RX10PSA, RX10PXTA
SUPPLEMENTARY SERVICE MANUAL
©2010 by Yamaha Motor
Corporation, U.S.A.
1st Edition, April 2010
All rights reserved. Any reprinting or
unauthorized use without the written
permission of Yamaha Motor Corporation,
U.S.A. is expressly prohibited.
Printed in U.S.A.
P/N.LIT-12618-02-97

MAJOR SPECIFICATIONS
Model

RX10PA

RX10PSA

RX10PXTA

Model code

8HG1

8JC1

8HN1

Catalogue name

Apex

Apex SE

Apex XTX

Class

Trail

Cross Country

Seating capacity

One

Engine type

Liquid cooled 4-stroke, 20 valves

Cylinder arrangement/
Displacement

Backward-inclined parallel 4-cylinder/998 cm3

Fuel system type

Electronic fuel injection

Track length

3,264.4 mm (128 in)

Front suspension

Independent, double wishbone

Front shock
absorber

Fox® FLOATTM 2
(air shock)

40 mm aluminum HPG

Rear suspension

Dual Shock® CK 144



40 mm aluminum HPG

®

Rear

40 mm aluminum HPG

Mono Shock® II RA 128
Front

Rear shock
absorber

3,648.5 mm (144 in)

46 mm KYB aluminum
HPG with remote
damping force adjuster

Fox® MEGA-FLOATTM
(air shock)

40 mm aluminum HPG

Ski type

Lightweight plastic, saddleless design

Electric start

Standard

Reverse

Standard

IMPORTANT
This manual was produced by the Yamaha Motor Company, Ltd. primarily for use by Yamaha dealers and their qualified mechanics. It is not possible to include all the knowledge of a mechanic in one
manual. Therefore, anyone who uses this book to perform maintenance and repairs on Yamaha
snowmobiles should have a basic understanding of mechanics and the techniques to repair these
types of snowmobiles. Repair and maintenance work attempted by anyone without this knowledge
is likely to render the snowmobile unsafe and unfit for use.
This model has been designed and manufactured to perform within certain specifications in regard
to performance and emissions. Proper service with the correct tools is necessary to ensure that the
snowmobile will operate as designed. If there is any question about a service procedure, it is imperative that you contact a Yamaha dealer for any service information changes that apply to this model.
This policy is intended to provide the customer with the most satisfaction from his snowmobile and
to conform to federal environmental quality objectives.
Yamaha Motor Company, Ltd. is continually striving to improve all of its models. Modifications and
significant changes in specifications or procedures will be forwarded to all authorized Yamaha dealers and will appear in future editions of this manual where applicable.
TIP
• This Service Manual contains information regarding periodic maintenance to the emission control
system.
Please read this material carefully.
• Designs and specifications are subject to change without notice.
IMPORTANT MANUAL INFORMATION
Particularly important information is distinguished in this manual by the following notations.
This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol
to avoid possible injury or death.

WARNING

A WARNING indicates a hazardous situation which, if not avoided,
could result in death or serious injury.

NOTICE

A NOTICE indicates special precautions that must be taken to avoid
damage to the snowmobile or other property.

TIP

A TIP provides key information to make procedures easier or clearer.

ILLUSTRATED SYMBOLS
(Refer to the illustration)
Illustrated symbols
to
are designed as
thumb tabs to indicate the chapter’s number
and content.
General information
Periodic inspection and adjustment
Chassis
Power train
Engine
Cooling system
Fuel injection system
Electrical
Specifications

Illustrated symbols
to
are used to identify the specifications which appear.
Filling fluid
Lubricant
Tightening torque
Wear limit, clearance
Engine speed
Special tool
Electrical data (Ω, V, A)
Illustrated symbols
to
in the exploded
diagram indicate grade of lubricant and location of lubrication point.
Apply locking agent (LOCTITE®)
Apply Yamabond No. 5®
Apply engine oil
Apply gear oil
Apply molybdenum disulfide oil
Apply brake fluid
Apply wheel bearing grease
Apply low-temperature lithium-soap-based
grease
Apply molybdenum disulfide grease
Apply silicone grease
ESSO beacon 325 grease or Aeroshell
grease #7A
Use new one

CONTENTS
GENERAL INFORMATION
PERIODIC INSPECTION AND
ADJUSTMENT
CHASSIS
POWER TRAIN
ENGINE
COOLING SYSTEM
FUEL INJECTION SYSTEM
ELECTRICAL
SPECIFICATIONS

GEN
INFO

1

INSP
ADJ

2

CHAS

3

POWR
TR

4

ENG

5

COOL

6

FI

7

ELEC

8

SPEC

9

CHAPTER 1.
GENERAL INFORMATION

CHAPTER 4.
POWER TRAIN

FEATURES.................................................... 1
OIL PRESSURE SENSING SYSTEM ...... 1

SLIDE RAIL SUSPENSION ........................ 66
INSPECTION.......................................... 68
INSTALLATION ...................................... 68

SPECIAL TOOLS .......................................... 2
FOR FUEL INJECTION SERVICE ........... 2

CHAPTER 2.
PERIODIC INSPECTION AND
ADJUSTMENT
ENGINE ......................................................... 3
THROTTLE BODY
SYNCHRONIZATION ............................... 3
ENGINE OIL REPLACEMENT ................. 5
EXHAUST SYSTEM INSPECTION ........ 10
EXUP CABLE ADJUSTMENT ................ 12
EXUP SERVO MOTOR
INSPECTION .......................................... 15
TRACK TENSION ADJUSTMENT.......... 16
EXTROVERT SPROCKET
WHEELS................................................. 18
LUBRICATION ........................................ 19
TUNING ....................................................... 20
CLUTCH ................................................. 20
GEAR SELECTION ................................ 31
HIGH ALTITUDE TUNING ...................... 32
FRONT SUSPENSION ........................... 34
REAR SUSPENSION ............................. 38
TROUBLESHOOTING
(SKI, SUSPENSION) .............................. 49

CHAPTER 3.
CHASSIS
GENERAL CHASSIS................................... 52
WINDSHIELD AND HEADLIGHT ........... 52
AIR FILTER CASE.................................. 53
SEAT AND TAIL/BRAKE LIGHT ............ 54
STEERING................................................... 55
STEERING.............................................. 55
REMOVAL .............................................. 57
INSPECTION .......................................... 57
INSTALLATION ...................................... 58

CHAPTER 5.
ENGINE
EXHAUST PIPE AND MUFFLER ............... 70
INSTALLATION ...................................... 73
CAMSHAFTS .............................................. 79
INSPECTION.......................................... 79
INSTALLATION ...................................... 83
CRANKCASE.............................................. 87

CHAPTER 7.
FUEL INJECTION SYSTEM
FUEL INJECTION SYSTEM ....................... 88
WIRING DIAGRAM ................................ 89
ECU SELF-DIAGNOSTIC
FUNCTION ............................................. 91
SELF-DIAGNOSTIC FUNCTION
TABLE .................................................... 91
TROUBLESHOOTING CHART .............. 94
DIAGNOSTIC MODE ............................. 95
TROUBLESHOOTING DETAILS ......... 104
OIL PRESSURE SENSING SYSTEM
TROUBLESHOOTING ......................... 108
ISC (IDLE SPEED CONTROL) UNIT ... 109
THROTTLE BODY .................................... 110
THROTTLE BODY ............................... 110
INJECTORS ......................................... 112
REMOVAL ............................................ 113
INSPECTION........................................ 113
INSPECTION AND ADJUSTMENT...... 114

CHAPTER 8.
ELECTRICAL
SWITCH INSPECTION .............................. 116
SWITCH INSPECTION ......................... 116
KNOCK SENSOR...................................... 117
EPS (ELECTRIC POWER STEERING)
SYSTEM .................................................... 118
CIRCUIT DIAGRAM.............................. 118
EPS CONTROL UNIT’S
SELF-DIAGNOSTIC FUNCTION .......... 119
EPS WARNING DISPLAY DURING
NORMAL OPERATION ........................ 120
DIAGNOSTIC MODE ............................ 121
SELF-DIAGNOSTIC FUNCTION
TABLE (EPS SYSTEM) ........................ 124
TROUBLESHOOTING DETAILS
(EPS SYSTEM)..................................... 125
EPS MOTOR INSPECTION ................. 129
EPS TORQUE SENSOR
INSPECTION ........................................ 129

CHAPTER 9.
SPECIFICATIONS
GENERAL SPECIFICATIONS .................. 131
MAINTENANCE SPECIFICATIONS ......... 132
ENGINE ................................................ 132
POWER TRAIN..................................... 132
CHASSIS .............................................. 135
ELECTRICAL........................................ 136
GENERAL TORQUE
SPECIFICATIONS ..................................... 137
DEFINITION OF UNITS ............................. 137
TIGHTENING TORQUE............................. 138
ENGINE ................................................ 138
POWER TRAIN..................................... 139
CHASSIS .............................................. 140
CABLE ROUTING ..................................... 141

FEATURES

GEN
INFO

GENERAL INFORMATION
FEATURES
OIL PRESSURE SENSING SYSTEM
This model is equipped with an oil pressure sensing system. When the oil pressure drops, the rpm
limiter is activated, and the engine rpm is reduced, or the engine is shut off, if necessary.
If the oil pressure is incorrect upon starting the engine
1. “OP-LO”
appears and the oil level/pressure warning indicator
illuminates on the meter display.

2. When the two items, above, are displayed, they indicate the rpm limiter is in operation; the rpm is
reduced to less than or equal to the clutch engagement rpm, even though the throttle is open. If
the incorrect oil pressure persists, the engine stops automatically after approximately one
minute.
3. When the oil pressure stabilizes to the correct level, the limiter is automatically canceled as long
as the throttle is not operated and then “OP-LO” disappears and the oil level/pressure warning
indicator goes off.
4. Note that it may take a few seconds for the oil pressure to rise to the optimum level after the
engine is started, even in normal conditions. If the meter display described in (1.) is no longer
displayed after a few seconds, this indicates that everything is normal.
TIP
When disassembling the engine, replacing the engine oil or oil filter, etc., if the oil is drained entirely
from the piping, there may be delay before the oil pressure rises.

1

SPECIAL TOOLS

GEN
INFO

SPECIAL TOOLS
Some special tools are necessary for a completely accurate tuneup and assembly. Using the correct special tool will help prevent
damage that can be caused by the use of improper tools or improvised techniques.
TIP
• Be sure to use the correct part number when ordering the tool,
since the part number may differ according to country.
• For USA and Canada, use part number starting with “YB-”, “YM-”,
“YU-” or “YS-”.
• For others, use part number starting with “90890-”.
FOR ELECTRICAL SERVICE
• Test harness-TPS (3P)
P/N: YU-03204
P/N: 90890-03204
This tool is used to measure voltage of the throttle position sensor.

2

THROTTLE BODY SYNCHRONIZATION

INSP
ADJ

PERIODIC INSPECTION AND
ADJUSTMENT
ENGINE
THROTTLE BODY SYNCHRONIZATION
TIP
Prior to synchronizing the throttle bodies, the
valve clearance should be properly adjusted.
1. Remove:
• Shroud
Refer to “COWLINGS” in CHAPTER 3.
• Top cover
• Headlight assembly
Refer to “GENERAL CHASSIS”.
• Headlight stay
Refer to “THROTTLE BODY”.
2. Remove:
• Vacuum caps
3. Install:
• Vacuummate (vacuum gauge)
• Digital tachometer
(Use goods on the market.
Recommended goods: Kaise SK-8401)
Vacuummate:
YU-44456
Vacuum gauge:
90890-03094
4. Start the engine and let it warm up for several minutes, and then let it run at specified
engine idling speed.
Engine idle speed:
1,550 ~ 1,650 r/min
5. Adjust:
• Throttle body synchronization

3

THROTTLE BODY SYNCHRONIZATION

INSP
ADJ

Adjustment steps:
• With throttle body #1 as standard, adjust
throttle body #2, #3 and #4 using the synchronizing screws .
TIP
After each step, rev the engine two or three
times, each time for less than a second, and
check the synchronization again.
Vacuum pressure at engine idling
speed:
20.97 ~ 23.63 kPa (157 ~ 177
mmHg, 6.2 ~ 7.0 inHg)
TIP
The difference in vacuum pressure between
two throttle bodies should not exceed 1.3 kPa
(10 mmHg, 0.4 inHg).
6. Check the engine idle speed.
Engine idle speed:
1,550 ~ 1,650 r/min
7. Stop the engine and remove the measuring
equipment.
8. Adjust:
• Throttle cable free play
Refer to “THROTTLE CABLE FREE PLAY
ADJUSTMENT”.
9. Install:
• Headlight stay
Refer to “THROTTLE BODY”.
• Headlight assembly
• Top cover
Refer to “GENERAL CHASSIS”.
• Shroud
Refer to “COWLINGS” in CHAPTER 3.

4

ENGINE OIL REPLACEMENT

INSP
ADJ

ENGINE OIL REPLACEMENT
This model is equipped with an oil pressure
sensing system. When the oil pressure drops,
the rev limiter is activated, and the engine is
stopped, if necessary. If the oil pressure is
incorrect when the engine is started, “OP-LO”
appears and the oil level/pressure warning
indicator illuminates. Note that it may take a
few seconds for the oil pressure to rise to the
optimum level after the engine is started, even
in normal conditions.
Refer to “OIL PRESSURE SENSING SYSTEM”.
TIP
If “OP-LO” remains on and the oil level/
pressure warning indicator remains illuminated
for more than a few seconds after starting the
engine, this indicates that oil pressure is incorrect. In this case, check the oil pressure sensing system.
1. Place the snowmobile on a level surface
and apply the parking brake.
2. Start the engine, warm up for several minutes, and then turn it off.
3. Place a containers under the engine oil
drain bolt and oil tank.

4. Remove:
• Bottom panel

5

ENGINE OIL REPLACEMENT

INSP
ADJ

5. Remove:
• Shroud
• Side cover (left and right)
• Side under cover (right)
Refer to “COWLINGS” in CHAPTER 3.
• Headlight assembly
• Air filter case
Refer to “GENERAL CHASSIS”.
• Battery
• Battery bracket
6. Disconnect:
• Oil level gauge coupler
Refer to “ENGINE OIL LEVEL INSPECTION” in CHAPTER 2.
7. Remove:
• Oil level gauge/dipstick
Refer to “ENGINE OIL LEVEL INSPECTION” in CHAPTER 2.

8. Remove:
• Cylinder head oil filler cap

9. Remove:
• Oil pan engine oil drain bolt

10.Remove:
• Oil tank engine oil drain bolt
11.Drain:
• Engine oil
(completely from the oil pan and oil tank)
12.If the oil filter cartridge is also to be
replaced, perform the following procedure.

6

ENGINE OIL REPLACEMENT

INSP
ADJ

Replacement steps:
• Remove the oil filter cartridge
filter wrench .

with an oil

TIP
Make sure that the O-ring is removed together
with the oil filter cartridge. If the O-ring remains
attached to the crankcase, oil leakage may
occur.
Oil filter wrench:
YM-01469
90890-01469
• Apply a thin coat of engine oil onto the O-ring
of the new oil filter cartridge.

NOTICE
Make sure that the O-ring is positioned correctly in the groove of the oil filter cartridge.
• Tighten the new oil filter cartridge to specification with an oil filter wrench.
Oil filter cartridge:
17 Nm (1.7 m•kgf, 12 ft•lbf)

13.Install:
• Drain bolts
(along with the new gaskets)
Oil tank engine oil drain bolt:
16 Nm (1.6 m•kgf, 12 ft•lbf)
Oil pan engine oil drain bolt:
30 Nm (3.0 m•kgf, 22 ft•lbf)

7

ENGINE OIL REPLACEMENT

INSP
ADJ

14.Fill:
• Engine oil
(with the specified amount of the recommended engine oil)
Add 2.0 L (2.11 US qt, 1.76 Imp.qt) of the
recommended engine oil to the oil tank, and
then install and tighten the oil level gauge/
dipstick and the cylinder head oil filter cap.
Quantity:
Total amount:
3.8 L (4.02 US qt, 3.34 Imp.qt)
Without oil filter cartridge
replacement:
2.8 L (2.96 US qt, 2.46 Imp.qt)
With oil filter cartridge
replacement:
3.0 L (3.17 US qt, 2.64 Imp.qt)
15.Inspect:
• Engine and oil tank
(for engine oil leaks)
16.Inspect:
• Engine oil level
Refer to “ENGINE OIL LEVEL INSPECTION” in CHAPTER 2.
TIP
If “OP-LO” remains on and the oil level/
pressure warning indicator remains illuminated
for more than a few seconds after starting the
engine, this indicates that oil pressure is incorrect. In this case, check the oil pressure sensing system.
Refer to “OIL PRESSURE SENSING SYSTEM
TROUBLESHOOTING”.

8

ENGINE OIL REPLACEMENT

INSP
ADJ

17.Inspect:
• Engine oil pressure
Inspection steps:
• Slightly loosen the oil check bolt .
• Start the engine and keep it idling until engine
oil starts to seep from the oil check bolt.
If no engine oil comes out after one minute,
turn the engine off so that it will not seize.
• Check the engine oil passages, the oil filter
and the oil pump for damage or leakage.
• Start the engine after solving the problem(-s)
and check the engine oil pressure again.
• Tighten the oil check bolt to specification.
Oil check bolt:
10 Nm (1.0 m•kgf, 7.2 ft•lbf)
18.Install:
• Bottom panel
Bottom panel bolt:
10 Nm (1.0 m•kgf, 7.2 ft•lbf)
19.Install:
• All removed parts
TIP
For installation, reverse the removal procedure.

9

EXHAUST SYSTEM INSPECTION

INSP
ADJ

EXHAUST SYSTEM INSPECTION
1. Remove:
• Left side cover
Refer to “COWLINGS” in CHAPTER 3.
• Seat
• Rear cover
Refer to “GENERAL CHASSIS”.
• Fuel tank
Refer to “FUEL TANK” in CHAPTER 5.
• Muffler cover plate
• Muffler cover
Refer to “EXHAUST PIPE AND MUFFLER”.

2. Inspect:
• Exhaust pipe joints
• Muffler
• Exhaust pipe
• Muffler band
• Exhaust pipe bands
• EXUP cable holder
• EXUP valve housing
• EXUP valve pulley
• Collar
• Plate
• Spring
• EXUP valve
• Collar
Cracks/damage → Replace.

10

EXHAUST SYSTEM INSPECTION

INSP
ADJ

3. Inspect:
• Tightening torque
Exhaust pipe joint bolt :
25 Nm (2.5 m•kgf, 18 ft•lbf)
Muffler bolt :
16 Nm (1.6 m•kgf, 12 ft•lbf)
Exhaust pipe bolt (front side)
25 Nm (2.5 m•kgf, 18 ft•lbf)
Exhaust pipe bolt (rear side)
16 Nm (1.6 m•kgf, 12 ft•lbf)
Muffler band bolt :
20 Nm (2.0 m•kgf, 14 ft•lbf)
Exhaust pipe band bolt :
18 Nm (1.8 m•kgf, 13 ft•lbf)
EXUP valve housing bolt :
10 Nm (1.0 m•kgf, 7.2 ft•lbf)
EXUP valve bolt :
7 Nm (0.7 m•kgf, 5.1 ft•lbf)

:
:

4. Inspect:
• EXUP cable (black metal)
• EXUP cable (white metal)
Damage → Replace.
5. Install:
• All removed parts
Refer to “EXHAUST PIPE AND MUFFLER”.

11

EXUP CABLE ADJUSTMENT

INSP
ADJ

EXUP CABLE ADJUSTMENT
1. Remove:
• Left side cover
Refer to “COWLINGS” in CHAPTER 3.
• Seat
Refer to “GENERAL CHASSIS”.
• Fuel tank
Refer to “FUEL TANK” in CHAPTER 5.

2. Remove:
• EXUP valve pulley cover

3. Inspect:
• EXUP system operation

Inspection steps:
• Activate the diagnostic mode and select the
diagnostic code number d: 53.

Refer to “DIAGNOSTIC MODE”.
• Check that the EXUP valve operates properly.
TIP
Check that the ø4 pin (93604-29184) can be
inserted into the boss
of the EXUP valve
housing. If the rod cannot be inserted, adjust
the EXUP cable.

12

EXUP CABLE ADJUSTMENT

INSP
ADJ

4. Adjust:
• EXUP cable
Adjustment steps:
a. Turn the main switch to “ON”
b. Slide the rubber cover
of the EXUP
cable (white metal).
c. Loosen the locknut .
d. Turn the EXUP valve pulley to the left so
that the notch
of the EXUP valve pulley
is positioned further to the left than the boss
of the EXUP valve housing.
e. Turn the adjusting nut
of the EXUP cable
(white metal) to direction
or
so that
the end of the snowmobile front notch
of
the EXUP valve pulley is aligned with the
alignment mark
of the exhaust pipe.
Direction
EXUP cable (white metal) free play is
increased
Direction
EXUP cable (white metal) free play is
decreased

f. Slide the rubber cover
of the EXUP
cable (black metal).
g. Loosen the locknut .
h. Turn the adjusting nut
of the EXUP cable
(black metal) in direction
or
so that
the notch
of the EXUP valve pulley is
aligned with the boss
of the EXUP valve
housing.
Direction
EXUP cable (black metal) free play is
increased
Direction
EXUP cable (black metal) free play is
decreased

13

EXUP CABLE ADJUSTMENT

INSP
ADJ

i. Check that the ø4 pin (93604-29184) can
be inserted into the boss of the EXUP valve
housing. If the rod cannot be inserted,
repeat the procedure from step (a).
j. Tighten the locknut, and then restore the
rubber cover to its original position.
k. Activate the diagnostic mode and select the
diagnostic code number d: 53.
Refer to “DIAGNOSTIC MODE”.
l. Again, check that the ø4 pin (93604-29184)
can be inserted into the boss of the EXUP
valve housing. If the rod cannot be inserted,
repeat the procedure from step (a).
TIP
The center of the notch of the EXUP valve pulley and the center of the boss of the EXUP
valve housing may be misaligned up to 2 mm
(0.08 in).
2 mm (0.08 in)

5. Install:
• EXUP valve pulley cover
EXUP valve pulley cover bolt:
10 Nm (1.0 m•kgf, 7.2 ft•lbf)

6. Install:
• Fuel tank
Refer to “FUEL TANK” in CHAPTER 5.
• Seat
• Left side cover
Refer to “COWLINGS” in CHAPTER 3.

14

EXUP SERVO MOTOR INSPECTION

INSP
ADJ

EXUP SERVO MOTOR INSPECTION
1. Inspect:
• EXUP servo motor operation
Rough movement → Replace.
Inspection steps:
a. Check that the EXUP valve is not firmly
fixed.
• Disconnect the EXUP cable and check that
the EXUP valve is moved smoothly by
hand.
• When the valve is not moved smoothly,
repair or replace it.
Refer to “EXUP CABLE ADJUSTMENT”.
b. With the EXUP cable installed, check that
the EXUP valve is neither smoothly nor
manually moved.
• When the EXUP valve is moved smoothly,
replace the EXUP servo motor.
c. Perform the self-diagnosis mode and check
the operation of EXUP valve by visual
inspection (code number d: 53).
Refer to “DIAGNOSTIC MODE”.

15

TRACK TENSION ADJUSTMENT

INSP
ADJ

TRACK TENSION ADJUSTMENT

WARNING
A broken track or track fittings, and debris
thrown by the track could be dangerous to
an operator or bystanders. Observe the following precautions.
• Do not allow anyone to stand behind the
snowmobile when the engine is running.
• When the rear of the snowmobile is raised
to allow the track to spin, a suitable stand
must be used to support the rear of the
snowmobile. Never allow anyone to hold
the rear of the snowmobile off the ground
to allow the track to spin. Never allow anyone near a rotating track.
• Inspect the condition of the track frequently. Replace the track if it is damaged
to a level where the fabric reinforcement
material is visible.
1. Lift the rear of the snowmobile onto a suitable stand to raise the track off the ground.
2. Measure:
• Track deflection
Using a spring scale
, pull down on the
center of the track with 100 N (10 kgf, 22
lbf) of force.
Out of specification → Adjust.
Track deflection:
30.0 ~ 35.0 mm (1.18 ~ 1.38 in)

3. Adjust:
• Track deflection
Adjustment steps:
a. Place the snowmobile onto a suitable stand
to raise the track off of the ground.
b. Loosen the rear axle nut .
c. Start the engine and rotate the track once
or twice. Stop the engine.

16

TRACK TENSION ADJUSTMENT

INSP
ADJ

d. Check the track alignment with the slide
runner . If the alignment is incorrect, turn
the left and right adjusters to adjust.
Track alignment
Left adjuster
Right adjuster

Shifted to
right
Turn out
Turn in

Shifted to
left
Turn in
Turn out

Slide runner
Track
Track clip
Gap
RX10PA, RX10PSA
RX10PXTA
Forward

e. Adjust the track deflection until the specified amount is obtained.
Track deflection
Left adjuster
Right adjuster

More than Less than
specified specified
Turn in
Turn out
Turn in
Turn out

NOTICE
The adjusters should be turned an equal
amount.
f. Recheck the alignment and deflection. If
necessary, repeat steps (c) to (e) until the
specified amount is obtained.
g. Apply ESSO beacon 325 grease or Aeroshell grease #7A to the rear axle nut.
h. Tighten the rear axle nut.
Rear axle nut:
75 Nm (7.5 m•kgf, 54 ft•lbf)

17

EXTROVERT SPROCKET WHEELS

INSP
ADJ

EXTROVERT SPROCKET WHEELS
1. Inspect:
• Extrovert sprocket wheels
Cracks/damage → Replace.
2. Measure:
• Teeth
a. Measuring point
20 mm (0.79 in)
b. Extrovert sprocket wheel wear limit
Out of specification → Replace.
Extrovert sprocket wheel wear
limit :
13 mm (0.51 in)

18

LUBRICATION

INSP
ADJ

LUBRICATION
Front and rear suspension
1. Remove:
• Front cover
Refer to “FRONT SUSPENSION” in CHAPTER 3.
2. Use a grease gun to inject grease into the
nipples (both sides)
and nipples .
3. Apply grease to the pivoting parts.
Recommended lubricant:
ESSO Beacon 325 grease or
Aeroshell grease #7A
Front
Rear (RX10PA, RX10PSA)
Rear (RX10PXTA)
Nipple (both sides)
Nipple

19

CLUTCH

INSP
ADJ

TUNING
CLUTCH
The clutch may require tuning depending upon
where the snowmobile will be operated and the
desired handling characteristics. The clutch
can be tuned by changing the engagement
and shifting speeds.
Clutch engagement speed is defined as the
engine speed at which the snowmobile first
begins to move from a complete stop.
Shifting speed is defined as the engine speed
reached when the snowmobile has travelled
800 m (2,500 ft) after being started at full-throttle from a dead stop.
Normally, when a snowmobile reaches shifting
speed, the snowmobile speed increases but
the engine speed remains nearly constant.
Under unfavorable conditions (wet snow, icy
snow, hills, or rough terrain), however, engine
speed may decrease after the shifting speed
has been reached.
Engine speed
Good condition
Shifting speed
Clutch engagement speed
Starting position
Distance travelled

20

CLUTCH

INSP
ADJ

High altitude tuning
Atmospheric pressure decreases and engine
output becomes low at high altitude locations.
Because of this, clutch engagement speed and
shifting speed also decrease and unable to
maximize the engine output power. To maximize the engine output, tuning for increasing
clutch engagement speed and shifting speed
is necessary. This setting is called high altitude
tuning.
The following changes are usually performed
in high altitude tuning.
• To increase the clutch engagement and shifting speed, changing to a larger spring constant or using lighter weights and rivets.
(decreasing primary sheave thrust)
• Increasing the reduction ratio of the driven
gear/drive gear. (increasing the driving performance)
Refer to “HIGH ALTITUDE TUNING”.
Engine speed
Speed at maximum output
Low speed
Distance travelled

21

CLUTCH

INSP
ADJ

Parts that affect transmission characteristics
Among the components of the V-belt transmission, those that have direct impact on the shifting
function are described below.

Part
Primary sheave
Spring

Element
Preload

Spring rate

Weight

Shape, weight

Impact on the shifting function
• A larger preload increases the clutch engagement
speed, and the shifting speed tends to rise
accordingly. Shifting tends to become somewhat
harder. (increasing the spring reaction force)
• A smaller preload decreases the clutch engagement speed, and the shifting speed tends to drop
accordingly. Shifting tends to become somewhat
easier. (decreasing the spring reaction force)
• A larger spring rate increases the shifting speed. It
also slightly increases the clutch engagement
speed. Shifting tends to become somewhat
harder. (increasing the spring reaction force)
• A smaller spring rate decreases the shifting
speed. It also slightly decreases the clutch
engagement speed. Shifting tends to become
somewhat easier. (decreasing the spring reaction
force)
Shape and weight determine, the size of moment
about the center of the weight rotation when the
sheave is running.
• Heavier weight decreases the clutch engagement
and shifting speed. Shifting tends to become
somewhat easier. (increasing the sheave thrust)
• Lighter weight increases the clutch engagement
and shifting speed. Shifting tends to become
somewhat harder. (decreasing the sheave thrust)

22

CLUTCH

Part
Weight rivet

Element
Quantity
Material
(iron, aluminum)

Roller

Outside diameter

Shim

Quantity

Secondary sheave
Spring

Fixed sheave
Spring seat

Preload
Spring rate
(compression,
torsion)

Spring fitting hole

INSP
ADJ

Impact on the shifting function
Rivets are fastened through the hole in the weight.
• Using more rivets decreases the clutch engagement and shifting speed. Shifting tends to become
somewhat easier. (increasing the sheave thrust)
• Using less rivets increases the clutch engagement
and shifting speed. Shifting tends to become
somewhat harder. (decreasing the sheave thrust)
The outside diameter affects the contact angle with
the weight.
• A smaller diameter decreases the clutch engagement speed. (increasing the sheave thrust)
• A larger diameter increases the clutch engagement speed. (decreasing the sheave thrust)
• Using more shims increases the preload and
clutch engagement speed.
(increasing the spring reaction force)
• Using less shim decreases the preload and clutch
engagement speed.
(decreasing the spring reaction force)
• A larger preload, spring rate or twist angle
increases the shifting speed and makes shifting
somewhat harder. (increasing the sheave thrust)
• A smaller preload, spring rate or twist angle
decreases the shifting speed and makes shifting
somewhat easier.
(decreasing the sheave thrust)
One of the holes may be used selectively to change
the spring twist angle (preload).
Refer to “ Spring”.

23

CLUTCH

Part
Torque cam
(spring seat)

Element
Cam angle

Shim

Quantity

INSP
ADJ

Impact on the shifting function
The cam angle determines the degree of sensitivity
of load torque detection.
• A smaller cam angle increases sensitivity, which in
turn increases the sheave thrust to make back
shifting easier. The shifting speed tends to
increase and shifting becomes somewhat harder.
(increasing the sheave thrust)
• A larger cam angle makes back shifting harder.
The shifting speed tends to decrease and shifting
becomes somewhat easier.
(decreasing the sheave thrust)
Size of the secondary sheave clearance (between
fixed sheave and sliding sheave) can be adjusted
by the number of shims used.
Adjust the clearance when the V-belt wear deteriorates and belt width becomes smaller.
• Using more shims makes secondary sheave
clearance smaller.
• Using less shim makes secondary sheave clearance larger.
When the V-belt width is smaller, wrap-around
diameter of the V-belt on the primary sheave is
larger and clutch engagement speed is slightly
increased.

24

CLUTCH

INSP
ADJ

Primary spring

Spring
identification
color code
Actual coloring

Part
number

Blue-Blue-Blue

90501-550A2

19.6 (2.00)

196 (20)

5.5 (0.217)

59.5 (2.34)

4.89

83.4 (3.28)

Blue-Pink-Blue

90501-551L3

19.6 (2.00)

294 (30)

5.5 (0.217)

59.5 (2.34)

4.91

88.4 (3.48)

Blue-Silver-Blue

90501-551L9

19.6 (2.00)

343 (35)

5.5 (0.217)

59.5 (2.34)

4.91

90.9 (3.58)

Spring rate
N/mm
(kgf/mm)

Preload
N (kgf)

Wire
gauge
mm (in)

Outside
diameter
mm (in)

Number
of coils

Free
length
mm (in)

Blue-Green-Blue

90501-552L5

19.6 (2.00)

392 (40)

5.5 (0.217)

59.5 (2.34)

4.91

93.4 (3.68)

Yellow-Blue-Yellow

90501-580A1

24.5 (2.50)

196 (20)

5.8 (0.228)

59.5 (2.34)

4.91

81.4 (3.20)

Yellow-Pink-Yellow

90501-581L5

24.5 (2.50)

294 (30)

5.8 (0.228)

59.5 (2.34)

4.92

85.4 (3.36)
84.3 (3.32)

Green-Pink-Green

90501-581L6

27.0 (2.75)

294 (30)

5.8 (0.228)

59.5 (2.34)

4.66

Yellow-Silver-Yellow

90501-582L1

24.5 (2.50)

343 (35)

5.8 (0.228)

59.5 (2.34)

4.92

87.4 (3.44)

Green-Silver-Green

90501-582L2

27.0 (2.75)

343 (35)

5.8 (0.228)

59.5 (2.34)

4.66

86.1 (3.39)

White-Green-White

90501-582L6

22.1 (2.25)

392 (40)

5.8 (0.228)

59.5 (2.34)

5.25

91.2 (3.59)

Yellow-Green-Yellow

90501-582L7

24.5 (2.50)

392 (40)

5.8 (0.228)

59.5 (2.34)

4.92

89.4 (3.52)

Blue-White-Blue

90501-583L0

19.6 (2.00)

441 (45)

5.8 (0.228)

59.5 (2.34)

5.65

95.9 (3.78)

White-White-White

90501-583L1

22.1 (2.25)

441 (45)

5.8 (0.228)

59.5 (2.34)

5.25

93.4 (3.68)

White-Silver-White

90501-583L4

22.1 (2.25)

343 (35)

5.8 (0.228)

59.5 (2.34)

5.25

89.0 (3.50)

White-Pink-White

90501-583L5

22.1 (2.25)

294 (30)

5.8 (0.228)

59.5 (2.34)

5.25

86.7 (3.41)

Pink-Blue-Pink

90501-600A1

29.4 (3.00)

196 (20)

6.0 (0.236)

59.5 (2.34)

4.81

80.1 (3.15)

Pink-Pink-Pink

90501-601L7

29.4 (3.00)

294 (30)

6.0 (0.236)

59.5 (2.34)

4.82

83.4 (3.28)

Orange-Pink-Orange

90501-601L8

31.9 (3.25)

294 (30)

6.0 (0.236)

59.5 (2.34)

4.60

82.6 (3.25)

Pink-Silver-Pink

90501-602L3

29.4 (3.00)

343 (35)

6.0 (0.236)

59.5 (2.34)

4.82

85.1 (3.35)

Green-Green-Green

90501-602L8

27.0 (2.75)

392 (40)

6.0 (0.236)

59.5 (2.34)

5.08

87.9 (3.46)

Pink-Green-Pink

90501-602L9

29.4 (3.00)

392 (40)

6.0 (0.236)

59.5 (2.34)

4.82

86.7 (3.41)

Yellow-White-Yellow

90501-603L2

24.5 (2.50)

441 (45)

6.0 (0.236)

59.5 (2.34)

5.39

91.4 (3.60)

Green-White-Green

90501-603L3

27.0 (2.75)

441 (45)

6.0 (0.236)

59.5 (2.34)

5.08

89.8 (3.54)

Orange-Silver-Orange

90501-624L8

31.9 (3.25)

343 (35)

6.2 (0.244)

59.5 (2.34)

5.00

84.2 (3.31)

25

Standard

RX10PA,
RX10PSA,
RX10PXTA

CLUTCH

INSP
ADJ

Weight
Part number

Weight g (oz)
without bush
and rivets

8DN-17605-30

39.76 (1.403)

8ES-17605-00

54.63 (1.927)

8FN-17605-00

75.28 (2.655)

8FP-17605-00

67.81 (2.392)

8FS-17605-00

65.52 (2.312)

8GC-17605-00

47.28 (1.668)

8GL-17605-00

49.43 (1.745)

Shape & ID mark

26

Standard

INSP
ADJ

CLUTCH

Part number

Weight g (oz)
without bush
and rivets

8HF-17605-00

81.51 (2.875)

8HG-17605-00

82.96 (2.926)

Shape & ID mark

Standard

RX10PA, RX10PSA,
RX10PXTA

Weight rivet
Part
number

Material

Length
mm (in)

Weight
g (oz)

Standard

90261-06033

Steel

17.2 (0.677)

4.5 (0.159)

CENTER: RX10PA, RX10PSA, RX10PXTA

90269-06006

Steel
with hole

17.2 (0.677)

3.6 (0.127)

IN: RX10PA, RX10PSA, RX10PXTA

90261-06034

Steel

13.9 (0.547)

3.6 (0.127)

90261-06019

Steel

13.3 (0.524)

3.1 (0.109)

OUT: RX10PXTA

90266-06002

Steel
with hole

13.3 (0.524)

2.44 (0.086)

OUT: RX10PA, RX10PSA

90261-06015

Steel

10.3 (0.406)

2.44 (0.086)

90261-06028

Aluminum

10.3 (0.406)

0.85 (0.030)

90266-06001

Aluminum
with hole

13.3 (0.524)

0.85 (0.030)

Effects
Increased
force

Decreased
force

27

CLUTCH

INSP
ADJ

Roller
I.D. 9 mm (0.354 in)
Roller with
bushing part
number

Outside
diameter
mm (in)

Identification mark
(Width)

Standard

Effects

Grooved & Machined

8FG-17624-00

Increased
force
RX10PA, RX10PSA,
RX10PXTA

14.5 (0.571)

(14.6 mm [0.57 in])
Grooved

8FG-17624-10

15.0 (0.591)

(14.6 mm [0.57 in])
No Mark

8FG-17624-20

15.6 (0.614)

(14.6 mm [0.57 in])
Grooved & Grooved

8FG-17624-30

16.0 (0.630)

(14.6 mm [0.57 in])
Machined

8FG-17624-40

16.5 (0.650)
Decreased
force

(14.6 mm [0.57 in])

Shim (primary sheave)
Part number

Thickness mm (in)

90201-483P9

Standard

1.0 (0.039)
RX10PA, RX10PSA,
RX10PXTA

None

28

CLUTCH

INSP
ADJ

Secondary sheave spring

Spring rate

Spring
identification
color code
Actual coloring

Part number

Torsion
N•mm/rad
(kgf•mm/rad)

Compression
N/mm (kgf/mm)
(lbf/in)

Wire
gauge
mm (in)

No. of
coils

Free
length
mm (in)

Outside
diameter
mm (in)
69.5 (2.74)

Brown

90508-500B1

6003 (613)

6.2 (0.63), 35.40

5.0 (0.197)

5.19

75 (2.95)

Red

90508-536A9

7147 (729)

7.3 (0.74), 41.68

5.3 (0.209)

5.53

75 (2.95)

69.5 (2.74)

Green

90508-556A2

8314 (848)

8.5 (0.87), 48.53

5.5 (0.217)

5.53

75 (2.95)

69.5 (2.74)

Silver

90508-556A7

9460 (965)

10.2 (1.04), 58.24

5.5 (0.217)

4.86

75 (2.95)

69.5 (2.74)

Pink

90508-60012

11876 (1211)

12.3 (1.26), 70.23

6.0 (0.236)

5.53

75 (2.95)

69.5 (2.74)

Pink-Pink

90508-60018

11876 (1211)

12.3 (1.26), 70.23

6.0 (0.236)

5.53

75 (2.95)

69.5 (2.74)

White

90508-60007

12654 (1290)

13.5 (1.38) 77.08

6.0 (0.236)

5.19

75 (2.95)

69.5 (2.74)

White-White

90508-60016

12654 (1290)

13.5 (1.38) 77.08

6.0 (0.236)

5.19

75 (2.95)

69.5 (2.74)

Standard

RX10PA,
RX10PSA,
RX10PXTA

Secondary spring twist angle

Seat

0

3

6

9

1

10°

40°

70°*

100°

2

20°

50°

80°

110°

3

30°

60°

90°

120°

Sheave

*:

Standard
RX10PA, RX10PSA, RX10PXTA

29

CLUTCH

INSP
ADJ

Torque cam (secondary spring seat)

Identification mark

Part number

Cam angle

8BVFA

8FA-17604-00

51°-43°

8BV71

8BV-17604-71

47°

8BV51

8BV-17604-51

45°

8BV31

8BV-17604-31

43°

8BV11

8BV-17604-11

41°

8BV91

8BV-17604-91

39°

Standard
RX10PA,
RX10PSA,
RX10PXTA

Effects
Quicker
up shifting during
acceleration

Quicker
back shifting
under load

Shim (secondary sheave)
Part number

Thickness mm (in)

90201-061H1

0.5 (0.020)

90201-06037

1.0 (0.039)

30

Standard
RX10PA, RX10PSA,
RX10PXTA

GEAR SELECTION

INSP
ADJ

GEAR SELECTION
The reduction ratio of the driven gear to the drive gear must be set according to where the snowmobile will be operated and driving conditions. If the load on the snowmobile is big such as driving at
high altitude mountain or towing, the driven/drive gear ratio should be increased. If the load on the
snowmobile is small such as driving on the fairly smooth surfaces or hard-compacted snow,
decrease the ratio.
Chain and sprocket
The drive and driven gears and the chains shown in the gear ratio chart are available as options.
Part name

Teeth & links

Drive sprocket

Driven sprocket

Chain

Part number

Standard

18 teeth

8FA-17682-80

19 teeth

8FA-17682-90

20 teeth

8FA-17682-00

21 teeth

8FA-17682-10

22 teeth

8FA-17682-20

23 teeth

8FA-17682-30

RX10PXTA

24 teeth

8FA-17682-40

RX10PA, RX10PSA

37 teeth

8FB-47587-70

RX10PA, RX10PSA, RX10PXTA

38 teeth

8FB-47587-80

39 teeth

8FB-47587-90

40 teeth

8FB-47587-00

68 links

94890-09068

RX10PXTA

70 links

94890-09070

RX10PA, RX10PSA

Gear ratio
The figures containing a decimal point represent the driven/drive gear ratios, while the bottom numbers designate the number of links in the chain.
Drive gear
18 teeth 19 teeth 20 teeth 21 teeth 22 teeth 23 teeth 24 teeth
Driven gear
1.76
68 links

1.68
1.61
1.54
68 links 68 links 70 links

1.90
1.81
68 links 68 links

1.73
1.65
1.58
68 links 70 links 70 links

39 teeth

2.17
2.05
1.95
1.86
68 links 68 links 68 links 68 links

1.77
1.70
1.63
70 links 70 links 70 links

40 teeth

2.22
2.11
2.00
1.90
68 links 68 links 68 links 70 links

1.82
1.74
1.67
70 links 70 links 70 links

37 teeth





38 teeth







31

INSP
ADJ

HIGH ALTITUDE TUNING
HIGH ALTITUDE TUNING
Specifications
Model: RX10PA, RX10PSA
~ 800 m
(~ 2,500 ft)

Elevation
Production
specification

600 ~ 1,400 m
(2,000 ~ 4,500 ft)

1,200 ~ 2,000 m
(4,000 ~ 6,500 ft)

1,800 ~ 2,600 m
(6,000 ~ 8,500 ft)

2,400 ~ 3,000 m
(8,000 ~ 10,000 ft)







Standard

Engine idle speed

1,550 ~ 1,650
r/min



Engagement speed

Approx. 3,400
r/min



Shift speed

Approx. 10,500
r/min



Secondary reduction
ratio (number of links)

24/37 (70 L)



Primary sheave
spring

90501-551L9







90501-624L8

Color*

L-S-L







O-S-O

Free length

90.9 mm (3.58 in)







84.2 mm (3.31 in)

Preload

343 N (35 kgf,
77 lbf)









Spring rate

19.6 N/mm
(2.00 kgf/mm,
111.9 lbf/in)







31.9 N/mm
(3.25 kgf/mm,
182.2 lbf/in)

Wire diameter

5.5 mm (0.217 in)







6.2 mm (0.244 in)

Outside diameter

59.5 mm (2.34 in)









8HG-17605-00
(8HG00)









Steel with hole
13.3 (OUT)







Weight (ID)

Weight rivet

Approx. 3,600
r/min

23/37 (68 L)

None (OUT)

Steel 17.2
(CENTER)

Steel with hole
13.3 (CENTER)

Steel with hole
17.2 (IN)

Steel 13.3 (IN)


Steel with hole
13.3 (IN)



Approx. 3,800
r/min






22/37 (68 L)

None (CENTER)



None (IN)



Roller outer diameter

14.5 mm (0.571 in)









Primary sheave shim

None









Secondary sheave
spring

90508-60012









P









Free length

75 mm (2.95 in)









Preload rate

70° (1-6)
11,876 N•mm/rad
(1,211 kgf•mm/rad)









Wire diameter

6.0 mm (0.236 in)









Outside diameter

69.5 mm (2.74 in)









Secondary torque
cam angle

51°–43°









Secondary sheave
shim

1.0 mm (0.039 in)









Color*

*: Color code

L
P

Blue
Pink

O Orange
S Silver

32

INSP
ADJ

HIGH ALTITUDE TUNING
Specifications

Model: RX10PXTA
~ 800 m
(~ 2,500 ft)

Elevation
Production
specification

600 ~ 1,400 m
(2,000 ~ 4,500 ft)

1,200 ~ 2,000 m
(4,000 ~ 6,500 ft)

1,800 ~ 2,600 m
(6,000 ~ 8,500 ft)

2,400 ~ 3,000 m
(8,000 ~ 10,000 ft)







Standard

Engine idle speed

1,550 ~ 1,650
r/min



Engagement speed

Approx. 3,400
r/min



Shift speed

Approx. 10,500
r/min



Secondary reduction
ratio (number of links)

23/37 (68 L)



Primary sheave
spring

90501-551L9







90501-624L8

L-S-L







O-S-O

Free length

90.9 mm (3.58 in)







84.2 mm (3.31 in)

Preload

343 N (35 kgf,
77 lbf)









Spring rate

19.6 N/mm
(2.00 kgf/mm,
111.9 lbf/in)







31.9 N/mm
(3.25 kgf/mm,
182.2 lbf/in)

Wire diameter

5.5 mm (0.217 in)







6.2 mm (0.244 in)

Outside diameter

59.5 mm (2.34 in)









8HG-17605-00
(8HG00)













Color*

Weight (ID)

Weight rivet

Approx. 3,600
r/min

22/37 (68 L)

Steel 13.3 (OUT)

Steel with hole
13.3 (OUT)

None (OUT)

Steel 17.2
(CENTER)

Steel 13.3
(CENTER)

Steel with hole
13.3 (CENTER)

Steel with hole
17.2 (IN)

Steel 13.3 (IN)





Approx. 3,800
r/min






21/37 (68 L)

None (CENTER)



None (IN)



Roller outer diameter

14.5 mm (0.571 in)









Primary sheave shim

None









Secondary sheave
spring

90508-60012









Color*

P









Free length

75 mm (2.95 in)









Preload rate

70° (1-6)
11,876 N•mm/rad
(1,211 kgf•mm/rad)









Wire diameter

6.0 mm (0.236 in)









Outside diameter

69.5 mm (2.74 in)









Secondary torque
cam angle

51°–43°









Secondary sheave
shim

1.0 mm (0.039 in)









*: Color code

L
P

Blue
Pink

O Orange
S Silver

33

INSP
ADJ

FRONT SUSPENSION
FRONT SUSPENSION
Spring Preload
RX10PA, RX10PXTA

WARNING
This shock absorber contains highly pressurized nitrogen gas. Do not tamper with or
attempt to open the shock absorber assemblies.
Do not subject the shock absorber assemblies to open flame or high heat, which
could cause it to explode.
1. Adjust:
• Spring preload
Adjustment steps:
• Loosen the locknut .
• Turn the spring seat
in or out.

NOTICE
Be sure that the left and right spring preloads are the same.
RX10PA
Spring seat
distance
Preload
Length

Standard
Short ←
Hard ←
Minimum

→ Long
→ Soft
Maximum

242.5 mm 252.5 mm
(9.55 in)
(9.94 in)

264.5 mm
(10.41 in)

RX10PXTA
Spring seat
distance
Preload
Length

Standard
Short ←
Hard ←
Minimum
247.0 mm
(9.72 in)

• Tighten the locknut

→ Long
→ Soft
Maximum
257.0 mm
(10.12 in)

257.0 mm
(10.12 in)

.

Shock absorber spring preload
adjusting locknut:
42 Nm (4.2 m•kgf, 30 ft•lbf)

34

FRONT SUSPENSION

INSP
ADJ

Air Pressure
RX10PSA

NOTICE
The left and right shock absorber air pressure must be set to the same setting.
Uneven settings can cause poor handling
and loss of stability.
This snowmobile is equipped with FOX shock
absorbers as standard equipment.
The air pressure of the shock absorbers can
be adjusted using the shock absorber pump
included with your snowmobile.
This shock absorber pump has low pressure
gauge
and high pressure gauge .
Low pressure gauge measuring range:
0 kPa (0 kgf/cm², 0 psi) to 620 kPa
(6.2 kgf/cm², 90 psi)
High pressure gauge measuring range:
0 kPa (0 kgf/cm², 0 psi) to 2,068 kPa
(20.7 kgf/cm², 300 psi)

Adjustment steps:

WARNING
Support the snowmobile securely on a suitable stand before adjusting the shock
absorbers.

NOTICE
Make sure that there is no load on the
shock absorbers and that they are fully
extended before making any air pressure
adjustments.
• Place the snowmobile on a level surface and
apply the parking brake.
• Lift the front of the snowmobile onto a suitable stand to raise the skis off the ground.
• Remove the air valve cap
from the shock
absorber.
35

FRONT SUSPENSION

INSP
ADJ

• Install the hose connector
of the shock
absorber pump to the shock absorber air
valve.
TIP
When installing, make sure the shock absorber
pump lever
is down as shown in the illustration.

NOTICE
Do not overtighten the connector onto the
air valve as this will damage the connector
seal.
• Lift up the shock absorber pump lever

.

TIP
• Use the low pressure gauge
of the shock
absorber pump and measure.
• If the shock absorber has no air pressure, the
gauge reading will be zero.
• To increase the air pressure, operate the
pump a few times. The pressure should
increase slowly. If the pressure increases
rapidly, check to make sure that the pump is
properly connected and tightened onto the air
valve. To decrease the air pressure, push the
bleed valve button .
TIP
To allow pressure to escape from the pump
and the shock absorber, push the button halfway down and hold it. To allow only a small
amount of pressure to escape, push the button
all the way down and quickly release it.
• Lay flat the shock absorber pump lever.
• Remove the hose connector from the air
valve.
TIP
When removing the connector, the sound of air
escaping may be heard, but this is from the
pump hose, not the shock absorber.

Air pressure range:
448 ~ 1,034 kPa (4.5 ~ 10.3 kgf/cm²,
65 ~ 150 psi)
Standard air pressure:
586 kPa (5.9 kgf/cm², 85 psi)

36

FRONT SUSPENSION

INSP
ADJ

NOTICE
Do not exceed 1,034 kPa (10.3 kgf/cm², 150
psi).
• Install the air valve cap.
TIP
If the front suspension bottoms too easily or
rolls too much during cornering, increase the
air pressure by 34 kPa (0.3 kgf/cm², 5 psi). If
the suspension is too firm and you want a
more compliant ride, decrease the air pressure
by 34 kPa (0.3 kgf/cm², 5 psi).

37

REAR SUSPENSION

INSP
ADJ

REAR SUSPENSION
Limiter strap
1. Adjust:
• Limiter strap length

NOTICE
Make sure the left and right rear suspension limiter straps are adjusted evenly.
(RX10PXTA)
TIP
This adjustment affects the handling characteristics of the snowmobile.

Adjustment steps:
• Remove the limiter strap bolts
, nuts and
washers.
• Adjust the length of the limiter strap
by
inserting the bolts in different holes.
Standard setting:
No. 1 hole
• Tighten the limiter strap nuts.
Limiter strap nut:
4.0 Nm (0.40 m•kgf, 2.9 ft•lbf)
RX10PA, RX10PSA
RX10PXTA

38

INSP
ADJ

REAR SUSPENSION
Choosing other settings:

NOTICE
The standard settings work well under
most general riding conditions. The suspension can be adjusted to work better in
one condition, but only at the expense of
another. Keep this in mind when you adjust
the suspension.
: No. 5 hole
: No. 4 hole
(shortest)
More weight on skis:
• Heavy steering/
oversteer
• More maneuverability
Favors: hardpack
snow, ice, smooth
trails, tight turns

No. 1 hole
(longest)
Less weight on skis:
• Light steering/
understeer
• Better acceleration
and speed
Favors: deep snow,
straight line acceleration, top speed

RX10PA, RX10PSA
RX10PXTA

Spring preload

WARNING
This shock absorber contains highly pressurized nitrogen gas. Do not tamper with or
attempt to open the shock absorber assembly.
Do not subject the shock absorber assembly to open flame or high heat, which could
cause it to explode.

39

INSP
ADJ

REAR SUSPENSION
1. Adjust:
• Spring preload
Adjustment steps:

Front side
RX10PXTA
• Loosen the locknut .
• Adjust the spring preload by turning the
spring seat .
Spring
Standard
seat
→ Long
distance Short ←
Preload Hard ←
→ Soft
Min.
Max.
Length
181.0 mm 191.0 mm 207.0 mm
(7.13 in)
(7.52 in)
(8.15 in)
• Tighten the locknut

.

Shock absorber spring preload
adjusting locknut:
42 Nm (4.2 m•kgf, 30 ft•lbf)

40

INSP
ADJ

REAR SUSPENSION
Rear side
RX10PA
• Turn the adjusting ring
tion.
Spring adjuster
1
position
Preload

2

tool

3

4

Soft ←

Standard
RX10PXTA
• Turn the adjuster

to the proper posi-

5

6

7

→ Hard
4

to proper position by the

.

Spring preload
adjuster
position
Spring preload
Standard

S

M

H

Soft

Medium
M

Hard

WARNING
Always adjust both spring preload (left and
right) to the same setting. Uneven adjustment can cause poor handling and loss of
stability.

41


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