Yamaha WR450F, Owner'S Service Manual

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ENG
TRANSMISSION, SHIFT CAM AND SHIFT FORK
EC4H3000
REMOVAL POINTS
Shift fork, shaft cam and transmission
1. Remove:
• Main axle
1
• Drive axle
2
• Shift cam
• Shift fork 3
• Shift fork 2
• Shift fork 1
NOTE:
• Remove assembly with the collar
3
installed
to the crankcase.
• Remove assembly carefully. Note the posi-
tion of each part. Pay particular attention to
the location and direction of shift forks.
• Remove the main axle, drive axle, shift cam
and shift fork all together by tapping lightly on
the transmission drive axle with a soft ham-
mer.
EC4H4000
INSPECTION
EC4H4200
Gears
1. Inspect:
• Matching dog
a
• Gear teeth
b
• Shift fork groove
c
Wear/damage
→
Replace.
2. Inspect:
• O-ring
1
Damage
→
Replace.
3. Check:
• Gears movement
Unsmooth movement
→
Repair or
replace.