clutch YAMAHA TTR125 2002 Owner's Manual

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ENGCLUTCH AND PRIMARY DRIVEN GEAR
EC490000
CLUTCH AND PRIMARY DRIVEN GEAR
EC498000
CLUTCH PLATE AND FRICTION PLATE
Extent of removal:1 Clutch plate and friction plate removal
Extent of removal Order Part name Q’ty Remarks
CLUCTH PLATE AND FRIC-
TION PLATE REMOVAL
Preparation for removal Drain the engine oil. Refer to “ENGINE OIL REPLACEMENT”
section in the CHAPTER 3.
Engine skidplate Refer to “ENGINE REMOVAL” section.
1 Kickstarter crank 1
2 Right crankcase cover 1
3 Gasket 1
4 Dowel pin 2
5 Clutch spring 4
6 Pressure plate 1
7 Ball 1
8 Friction plate 5
9 Clutch plate 4
10 Nut/washer 1/1
11 Push rod 1 1
12 Push plate 1
1

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ENGCLUTCH AND PRIMARY DRIVEN GEAR
EC498100
PRIMARY DRIVEN GEAR
Extent of removal:1 Primary driven gear removal2 Primary drive gear removal
Extent of removal Order Part name Q’ty Remarks
PRIMARY DRIVEN GEAR
REMOVAL
1 Nut (clutch boss) 1
Use special tool.
Refer to “REMOVAL POINTS”. 2 Lock washer 1
3 Clutch boss 1
4 Thrust plate 1
5 Primary driven gear 1
6 Thrust plate 1
7 Conical spring washer 1
8 Nut (primary drive gear) 1
Refer to “REMOVAL POINTS”.
9 Primary drive gear 1
10Straight key
1
2
1

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ENGCLUTCH AND PRIMARY DRIVEN GEAR
PUSH LEVER
Extent of removal:1 Push lever removal
Extent of removal Order Part name Q’ty Remarks
PUSH LEVER REMOVAL
1 Clutch cable 1
2 Push lever 1
3 Spring 1
4 Circlip 1
5Oil seal
1
1

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ENGCLUTCH AND PRIMARY DRIVEN GEAR
EC493000
REMOVAL POINTS
Clutch boss
1. Remove:
lNut 1
lLock washer
lClutch boss 2
NOTE:
Straighten the lock washer tab and use the
clutch holding tool 3 to hold the clutch boss.
For USA and CDN
õExcept for USA and CDN
Clutch holding tool:
YM-91042/90890-04086
õ
Primary drive gear
1. Remove:
lNut (primary drive gear) 1
lPrimary drive gear 2
NOTE:
lPlace a folded rag or aluminum plate
between the teeth of the primary drive gear
and primary driven gear.
lTake care not to damage the gear teeth.
EC494000
INSPECTION
EC484100
Clutch housing and boss
1. Inspect:
lClutch housing 1
Cracks/wear/damage ® Replace.
lClutch boss 2
Scoring/wear/damage ® Replace.
EC484201
Primary driven gear
1. Check:
lCircumferential play
Free play exists ® Replace.
lGear teeth a
Wear/damage ® Replace.

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ENGCLUTCH AND PRIMARY DRIVEN GEAR
EC484400
Clutch spring
1. Measure:
lClutch spring free length a
Out of specification ® Replace springs
as a set.
Clutch spring free length:
33 mm (1.30 in)
: 31 mm (1.22 in)
EC484500
Friction plate
1. Measure:
lFriction plate thickness
Out of specification ® Replace friction
plate as a set.
Measure at all four points.
EC484600
Clutch plate
1. Measure:
lClutch plate warpage
Out of specification ® Replace clutch
plate as a set.
Use a surface plate 1 and thickness
gauge 2.
Push lever
1. Inspect:
lPush lever 1
Wear/damage ® Replace.
Friction plate thickness:
2.92 ~ 3.08 mm
(0.115 ~ 0.121 in)
: 2.8 mm (0.110 in)
Warp limit:
0.2 mm (0.008 in)

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ENGCLUTCH AND PRIMARY DRIVEN GEAR
Push rod
1. Inspect:
lPush rod 1 1
lBall 2
Wear/damage/bend ® Replace.
Primary drive gear
1. Inspect:
lPrimary drive gear
Wear/damage ® Replace.
EC495000
ASSEMBLY AND INSTALLATION
Push lever
1. Install:
lPush lever 1
NOTE:
lApply the lithium soap base grease on the oil
seal lip.
lApply the engine oil on the push lever.
Primary drive gear
1. Install:
lStraight key
lPrimary drive gear 1
lWasher 2
lNut (primary drive gear) 3
lPrimary driven gear 4
NOTE:
lInstall the primary drive gear with the stamp
a facing out.
lPlace a folded rag or aluminum plate 5
between the teeth of the primary drive gear
and primary driven gear.
T R..70 Nm (7.0 m · kg, 50 ft · lb)

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ENGCLUTCH AND PRIMARY DRIVEN GEAR
Clutch
1. Install:
lConical spring washer 1
lThrust plate 2
lPrimary driven gear 3
lThrust plate 4
lClutch boss 5
2. Install:
lLock washer
lNut (clutch boss) 1
NOTE:
Use the clutch holding tool 2 to hold the clutch
boss.
For USA and CDN
õExcept for USA and CDN
3. Bend:
lLock washer tab
Clutch holding tool:
YM-91042/90890-04086
New
T R..60 Nm (6.0 m · kg, 43 ft · lb)

õ
4. Install:
lFriction plate 1
lClutch plate 2
NOTE:
lInstall the clutch plates and friction plates
alternately on the clutch boss, starting with a
friction plate and ending with a friction plate.
lApply the engine oil on the friction plates and
clutch plates.
lBe sure to install a clutch plate with projec-
tion a offset approximately 90˚ from previ-
ous plates projection. Continue this
procedure in a clockwise direction until all
clutch plates are installed.

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ENGCLUTCH AND PRIMARY DRIVEN GEAR
5. Install:
lBall
NOTE:
Apply the engine oil on the ball.
6. Install:
lPush rod 1 1
lPush plate 2
lWasher 3
lNut (push rod 1) 4
7. Install:
lPressure plate 1
lClutch spring 2
lBolt (clutch spring) 3
NOTE:
lAlign the arrow mark a on the pressure
plate with the punched mark b on the clutch
boss.
lTighten the bolts in stage, using a crisscross
pattern.
T R..6 Nm (0.6 m · kg, 4.3 ft · lb)
8. Check:
lPush lever position
Push the push lever assembly in the
arrow direction and make sure that the
mach mark are aligned ® adjust.
aMatch mark on the push lever assembly
bMatch mark on the crankcase

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ENGCLUTCH AND PRIMARY DRIVEN GEAR
9. Adjust:
lPush lever position
Adjustment steps:
lLoosen the locknut 1.
lTurn the push rod 1 2 clockwise or coun-
terclockwise to match alignment marks.
lHold the push rod 1 to prevent it from
moving and tighten the locknut to specifi-
cation.
lTighten the locknut 1.
T R..
Locknut:
8 Nm (0.8 m • kg, 5.8 ft • lb)
10. Install:
lDowel pins
lGasket (right crankcase cover)
lRight crankcase cover
lBolts (right crankcase cover)
NOTE:
lApply Quick gasket® (YAMAHA Bond
No.1215) to end of the right crankcase cover
bolts, as shown.
lTighten the bolts in stages, using a criss-
cross pattern.
Quick gasket®:
ACC-QUICK-GS-KT
YAMAHA Bond No.1215:
90890-85505
New
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
11. Install:
lKickstarter crank 1
lNut (kickstarter crank) 2
NOTE:
Install the kickstarter crank so that there is 5 ~
10 mm (0.2 ~ 0.4 in) a between the kickstarter
crank and the right crankcase cover.
T R..50 Nm (5.0 m · kg, 36 ft · lb)

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ENGOIL PUMP
OIL PUMP
Extent of removal:1 Oil pump removal
Extent of removal Order Part name Q’ty Remarks
OIL PUMP REMOVAL
Preparation for removal Clutch and primary drive gear Refer to “CLUTCH AND PRIMARY
DRIVEN GEAR” section.
1 Rotary filter 1
2 Oil pump drive gear 1
3 Oil pump assembly 1
4 Gasket 1
5Oil strainer
1
1