Yamaha YZ250F(T) Owner's Service Manual page 448

TRANSMISSION, SHIFT CAM AND SHIFT FORK
EC4H3000
REMOVAL POINTS
EC4H3230
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
replace.
EC4H4600
Bearing
1. Inspect:
• Bearing 1
Rotate inner race with a finger.
Rough spot/seizure → Replace.
4 - 97
ENG
→
movement Repair or