Yamaha YZ450F Manuel D'atelier Du Proprietaire page 430

TRANSMISSION, SHIFT CAM AND SHIFT FORK
EC4H3000
REMOVAL POINTS
Shift fork, shaft cam and transmission
1. Remove:
• Shift forks
• Shift cam
• Main axle
• Drive axle
NOTE:
• Tap lightly on the transmission drive axle and
shift cam with a soft hammer to remove.
• Remove assembly carefully. Note the posi-
tion of each part. Pay particular attention to
the location and direction of shift forks.
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
replace.
EC4H4600
Bearing
1. Inspect:
• Bearing 1
Rotate inner race with a finger.
Rough spot/seizure → Replace.
4 - 95
ENG
→
movement Repair or