clutch YAMAHA TTR125 2007 Owner's Guide

4 - 43
ENGCLUTCH AND PRIMARY DRIVEN GEAR
EC493000
REMOVAL POINTS
Clutch boss
1. Remove:
Nut 1
Lock washer
Clutch boss 2
NOTE:
Straighten the lock washer tab and use the
clutch holding tool 3 to hold the clutch boss.
ÅFor USA and CDN
ıExcept for USA and CDN
Clutch holding tool:
YM-91042/90890-04086Å
ı
Primary drive gear
1. Remove:
Nut (primary drive gear) 1
Primary drive gear 2
NOTE:
Place a folded rag or aluminum plate
between the teeth of the primary drive gear
and primary driven gear.
Take care not to damage the gear teeth.
EC494000
INSPECTION
EC484100
Clutch housing and boss
1. Inspect:
Clutch housing 1
Cracks/wear/damage → Replace.
Clutch boss 2
Scoring/wear/damage → Replace.
EC484201
Primary driven gear
1. Check:
Circumferential play
Free play exists → Replace.
Gear teeth a
Wear/damage → Replace.

4 - 44
ENGCLUTCH AND PRIMARY DRIVEN GEAR
EC484400
Clutch spring
1. Measure:
Clutch 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:
Friction plate thickness
Out of specification → Replace friction
plate as a set.
Measure at all four points.
EC484600
Clutch plate
1. Measure:
Clutch plate warpage
Out of specification → Replace clutch
plate as a set.
Use a surface plate 1 and thickness
gauge 2.
Push lever
1. Inspect:
Push 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)

4 - 45
ENGCLUTCH AND PRIMARY DRIVEN GEAR
Push rod
1. Inspect:
Push rod 1 1
Ball 2
Wear/damage/bend → Replace.
Primary drive gear
1. Inspect:
Primary drive gear
Wear/damage → Replace.
EC495000
ASSEMBLY AND INSTALLATION
Push lever
1. Install:
Push lever 1
NOTE:
Apply the lithium soap base grease on the oil
seal lip.
Apply the engine oil on the push lever.
Primary drive gear
1. Install:
Straight key
Primary drive gear 1
Washer 2
Nut (primary drive gear) 3
Primary driven gear 4
NOTE:
Install the primary drive gear with the stamp
a facing out.
Place 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)

4 - 46
ENGCLUTCH AND PRIMARY DRIVEN GEAR
Clutch
1. Install:
Conical spring washer 1
Thrust plate 2
Primary driven gear 3
Thrust plate 4
Clutch boss 5
2. Install:
Lock washer
Nut (clutch boss) 1
NOTE:
Use the clutch holding tool 2 to hold the clutch
boss.
ÅFor USA and CDN
ıExcept for USA and CDN
3. Bend:
Lock washer tab
Clutch holding tool:
YM-91042/90890-04086
New
T R..60 Nm (6.0 m · kg, 43 ft · lb)
Å
ı
4. Install:
Friction plate 1
Clutch plate 2
NOTE:
Install the clutch plates and friction plates
alternately on the clutch boss, starting with a
friction plate and ending with a friction plate.
Apply the engine oil on the friction plates and
clutch plates.
Be 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.

4 - 47
ENGCLUTCH AND PRIMARY DRIVEN GEAR
5. Install:
Ball
NOTE:
Apply the engine oil on the ball.
6. Install:
Push rod 1 1
Push plate 2
Washer 3
Nut (push rod 1) 4
7. Install:
Pressure plate 1
Clutch spring 2
Bolt (clutch spring) 3
NOTE:
Align the arrow mark a on the pressure
plate with the punched mark b on the clutch
boss.
Tighten the bolts in stage, using a crisscross
pattern.
T R..6 Nm (0.6 m · kg, 4.3 ft · lb)
8. Check:
Push 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

4 - 48
ENGCLUTCH AND PRIMARY DRIVEN GEAR
9. Adjust:
Push lever position
10. Install:
Dowel pins
Gasket (right crankcase cover)
Right crankcase cover
Negative battery lead
(TT-R125E/TT-R125LWE) 1
Lead holder
(TT-R125E/TT-R125LWE) 2
Bolts (right crankcase cover)
NOTE:
Apply Quick gasket® (YAMAHA Bond
No.1215) to end of the right crankcase cover
bolts, as shown.
Tighten the bolts in stages, using a criss-
cross pattern. Adjustment steps:
Loosen the locknut 1.
Turn the push rod 1 2 clockwise or coun-
terclockwise to match alignment marks.
Hold the push rod 1 to prevent it from
moving and tighten the locknut to specifi-
cation.
Tighten the locknut 1.
T R..
Locknut:
8 Nm (0.8 m • kg, 5.8 ft • lb)
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:
Kickstarter crank 1
Nut (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)

4 - 49
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
1
1
1
1
1
1
1 Rotary filter
2 Oil pump drive gear
3
Washer
4 Oil pump assembly
5 Gasket
6 Oil strainer

4 - 53
ENGKICK AXLE AND SHIFT SHAFT
KICK AXLE AND SHIFT SHAFT
KICK AXLE AND SHIFT SHAFT
Extent of removal:1 Kick axle removal2 Shift shaft removal
Extent of removal Order Part name Q’ty Remarks
KICK AXLE AND SHIFT SHAFT
REMOVAL
Preparation for removal Shift pedal link Refer to “ENGINE REMOVAL” section.
Clutch Refer to “CLUTCH AND PRIMARY
DRIVEN GEAR” section.
1 Kick axle assembly 1 Refer to “REMOVAL POINTS”.
2 Circlip 1
3 Washer 1
4 Kick idle gear 1
5 Washer 1
6 Circlip 1
7 Shift shaft 1
8 Circlip 1
9 Torsion spring 1
10 Bolt (stopper lever) 1
11 Stopper lever 1
12 Spring 1
13 Segment 1 Refer to “REMOVAL POINTS”.
1
2

4 - 61
ENG
CDI MAGNETO AND STARTER CLUTCH
(TT-R125E/TT-R125LWE)
CDI MAGNETO AND STARTER CLUTCH (TT-R125E/TT-R125LWE)
Extent of removal:1 Pickup coil/stator removal2 Starter clutch/wheel gear removal
Extent of removal Order Part name Q’ty Remarks
CDI MAGNETO AND STATOR
REMOVAL
Preparation for removal Fuel tank
1 CDI magneto lead 1
2 Neutral switch lead 1
3 Left crankcase cover 1
4 Nut (rotor) 1
Use special tool.
Refer to “REMOVAL POINTS”.
5 Rotor 1
6 Starter clutch 1
7 Woodruff key 1
8 Starter wheel gear 1
9 Plain washer 1
10 Plate (starter idle gear) 1
11 Starter idle gear 1
12 Lead guide 1
13Pickup coil/stator assembly
1
1
2
1
1

4 - 62
ENG
CDI MAGNETO AND STARTER CLUTCH
(TT-R125E/TT-R125LWE)
REMOVAL POINTS
Rotor
1. Remove:
Nut (rotor) 1
Plain washer 2
Use the sheave holder 3.
Sheave holder:
YS-1880-A/90890-01701
2. Remove:
Rotor 1
Use the flywheel puller 2.
Flywheel puller:
YU-33270-B/90890-01362
EC4L4000
INSPECTION
EC4L4101
CDI magneto
1. Inspect:
Rotor inner surface a
Stator outer surface b
Damage → Inspect the crankshaft
runout and crankshaft bearing.
If necessary, replace CDI magneto and/
or stator.
EC4L4200
Woodruff key
1. Inspect:
Woodruff key 1
Damage → Replace.
Starter clutch
1. Check:
Starter clutch
Damage/wear → Replace.
2. Check:
Idle gear
Starter clutch gear
Pitting/burrs/chips/roughness/wear →
Replace the defective parts.