2002 YAMAHA TTR125 engine

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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

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ENGKICK AXLE AND SHIFT SHAFT
Shift shaft
1. Install:
lShift shaft 1
NOTE:
lApply the lithium soap base grease on the oil
seal lip of the left crankcase side.
lHook the spring ends onto the stopper 2.
Kick axle assembly
1. Install:
lKickstarter segment gear 1
lPlain washer 2
lTorsion spring 3
On kick axle 4.
NOTE:
Make sure the stopper a of the torsion spring
fits into the hole b on the kick axle.
2. Install:
lSpring guide 1
NOTE:
Slide the spring guide into the kick axle, make
sure the groove a in the spring guide fits on
the stopper of the torsion spring.
3. Install:
lKick axle assembly 1
NOTE:
lApply the engine oil on the kick axle.
lSlide the kick axle assembly into the crank-
case, make sure the clip 2 and kick axle
stopper b fit into their home positions a, c.
4. Hook:
lTorsion spring 1
NOTE:
Turn the torsion spring clockwise and hook
into the proper hole a in the crankcase.

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ENGKICK AXLE AND SHIFT SHAFT
Kick idle gear
1. Install:
lCirclip 1
lWasher 2
lKick idle gear 3
lWasher 4
lCirclip 5
NOTE:
lApply the engine oil on the kick idle gear
inner circumference.
lInstall the kick idle gear with its depressed
side toward you.
New
New

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ENGCDI MAGNETO
EC4L0000
CDI MAGNETO
Extent of removal:1 CDI magneto removal
Extent of removal Order Part name Q’ty Remarks
CDI MAGNETO REMOVAL
Preparation for removal Seat and fuel tank Refer to “SAET, FUEL TANK AND SIDE
COVERS” section.
Drain the engine oil Refer to “ENGINE OIL REPLACEMENT”
section in the CHAPTER 3.
Drive sprocket cover Refer to “ENGINE REMOVAL” section.
1 CDI magneto lead 1
2 Left crankcase cover 1
3 Nut (rotor) 1
Use special tool.
Refer to “REMOVAL POINTS”.
4 Rotor 1
5 Woodruff key 1
6 Pickup coil 1
7 Lead guide 1
8Stator
1
1

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ENGENGINE REMOVAL
ENGINE REMOVAL
Extent of removal:1 Engine removal
Extent of removal Order Part name Q’ty Remarks
ENGINE REMOVAL
Preparation for removal Hold the machine by placing the
suitable stand under the frame.
Seat, fuel tank and side covers Refer to “SEAT, FUEL TANK AND SIDE
COVERS” section.
Carburetor Refer to “CARBURETOR” section.
Muffler Refer to “MUFFLER” section.
Clutch cable Disconnect at engine side.
Spark plug cap
Disconnect the CDI magneto
lead.
Drain the engine oil. Refer to “ENGINE OIL REPLACEMENT”
section in the CHAPTER 3.

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ENGENGINE REMOVAL
Extent of removal Order Part name Q’ty Remarks
1 Drive sprocket cover 1
2 Bolt (drive sprocket) 2
Refer to “REMOVAL POINTS”. 3 Drive sprocket holder 1
4 Drive sprocket 1
5 Shift pedal link 1
6 Crankcase breather hose 1
7 Engine bracket (upper) 1
8 Engine skidplate 1
9 Engine bracket (front) 1
10 Engine mounting bolt (rear) 2
11Engine
1Refer to “REMOVAL POINTS”.
1

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ENGENGINE REMOVAL
REMOVAL POINTS
Drive sprocket
1. Remove:
lBolt (drive sprocket)
lDrive sprocket holder 1
lDrive sprocket 2
lDrive chain 3
NOTE:
Remove the drive sprocket together with the
drive chain.
Engine removal
1. Remove:
lEngine 1
From left side.
NOTE:
Make sure that the couplers, hoses and cables
are disconnected.
ASSEMBLY AND INSTALLATION
Engine installation
1. Install:
lEngine 1
Install the engine from left side.
lEngine mounting bolt (rear) 2
lEngine bracket (front) 3
lBolt (engine bracket) 4
lEngine mounting bolt (lower) 5
lEngine mounting bolt (front) 6
lEngine bracket (upper) 7
lEngine mounting bolt (upper) 8
lBolt (engine bracket) 9
T R..40 Nm (4.0 m · kg, 29 ft · lb)
T R..40 Nm (4.0 m · kg, 29 ft · lb)
T R..40 Nm (4.0 m · kg, 29 ft · lb)
T R..40 Nm (4.0 m · kg, 29 ft · lb)
T R..40 Nm (4.0 m · kg, 29 ft · lb)
T R..40 Nm (4.0 m · kg, 29 ft · lb)

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ENGENGINE REMOVAL
NOTE:
lApply the lithium soap base grease on the
thread of the engine mounting bolts (rear) 2.
lTighten the engine mounting bolt (upper) 8,
and then tighten the bolts (engine bracket)
9.
Shift pedal link
1. Install:
lShift pedal link 1
lBolt (shift pedal link) 2
NOTE:
Adjust the center a of the front end of the shift
pedal to match the highest point of the foot-
rest.
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
Drive sprocket
1. Install:
lDrive sprocket 1
lDrive chain 2
NOTE:
Install the drive sprocket together with the
drive chain.
2. Install:
lDrive sprocket holder 1
lBolt (drive sprocket)
T R..6 Nm (0.6 m · kg, 4.3 ft · lb)
3. Install:
lDrive sprocket cover 1
lBolt (drive sprocket cover) 2
T R..12 Nm (1.2 m · kg, 8.7 ft · lb)