Yamaha WR450F, Owner'S Service Manual

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ENG
AC MAGNETO AND STARTER CLUTCH
EC4L3000
REMOVAL POINTS
Rotor
1. Remove:
• Nut (rotor)
1
• Plain washer
Use the sheave holder
2
.
Sheave holder:
YS-1880-A/90890-01701
2
1
2. Remove:
• Rotor
1
Use the rotor puller
2
.
Rotor puller:
YM-04142/90890-04142
Starter clutch
1. Remove:
• Starter clutch assembly cover
1
NOTE:
Insert a thin screwdriver or the like under the
convexity
a
and remove the starter clutch
assembly cover by prying it gently to void dam-
age to the cover.
1
a
2. Remove:
• Starter clutch
1
NOTE:
Using a thin screwdriver or the like, remove the
plate
a
while prying it upward little by little.
1 a
EC4L4000
INSPECTION
AC magneto
1. Inspect:
• Rotor inner surface
a
• Stator outer surface
b
Damage
→
Inspect the crankshaft runout
and crankshaft bearing.
If necessary, replace AC magneto and/or
stator.