2004 YAMAHA TTR125 key

4 - 60
ENG
2. Install:
Woodruff key 1
Rotor 2
NOTE:
Clean the tapered portions of the crankshaft
and rotor.
When installing the woodruff key, make sure
that its flat surface a is in parallel with the
crankshaft center line b.
When installing the rotor, align the keyway of
the rotor with the woodruff key.
3. Install:
Plain washer 1
Nut (rotor) 2
Use the sheave holder 3.
Sheave holder:
YS-1880-A/90890-01701
T R..80 Nm (8.0 m · kg, 58 ft · lb)
4. Install:
Dowel pin
Gasket
Left crankcase cover
Bolt (left crankcase cover)
NOTE:
Tighten the screws in stage, using a crisscross
pattern.
New
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
5. Connect:
CDI magneto lead
Refer to “CABLE ROUTING DIAGRAM”
section in the CHAPTER 2.
CDI MAGNETO (TT-R125/TT-R125LW)

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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

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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.

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ENG
3. Install the starter clutch 1 on the rotor 2.
NOTE:
Install the starter clutch with its plate portion
a facing the rotor.
Insert the plate portion of the starter clutch
so that it is flush with the surface of contact
b with the rotor.
12 b
a
4. Tighten:
Bolt (starter clutch)
NOTE:
Caulk a the end of the starter clutch holding
bolt near its outer diameter to serve as a stop-
per.
a
T R..30 Nm (3.0 m · kg, 22 ft · lb)
5. Install:
Starter wheel gear 1
Woodruff key 2
Rotor 3
NOTE:
Clean the tapered portion of the crankshaft
and the magneto hub.
When installing the magneto rotor, make
sure the woodruff key is properly seated in
the key way of the crankshaft.
Apply the engine oil on the starter wheel
gear inner circumference.
6. Install:
Plain washer 1
Nut (magneto) 2
NOTE:
Tighten the nut (magneto) while holding the
magneto with a sheave holder 3.
Sheave holder:
YS-1880-A/90890-01701
2
1
3
E
T R..80 Nm (8.0 m · kg, 58 ft · lb)
CDI MAGNETO AND STARTER CLUTCH
(TT-R125E/TT-R125LWE)