Yamaha WR250F Manuel D'atelier page 464

TRANSMISSION, SHIFT CAM AND SHIFT FORK
EC4H3000
REMOVAL POINTS
EC4H3230
Transmission
1. Remove:
Main axle 1
G
Drive axle 2
G
Shift cam
G
Shift fork 3
G
Shift fork 2
G
Shift fork 1
G
NOTE:
Remove assembly with the collar 3 installed
G
to the crankcase.
Remove assembly carefully. Note the posi-
G
tion of each part. Pay particular attention to
the location and direction of shift forks.
Remove the main axle, drive axle, shift cam
G
and shift fork all together by tapping lightly
on the transmission drive axle with a soft
hammer.
EC4H4000
INSPECTION
EC4H4200
Gears
1. Inspect:
Matching dog a
G
Gear teeth b
G
Shift fork groove c
G
Wear/damage → Replace.
2. Inspect:
O-ring 1
G
Damage → Replace.
3. Check:
Gears movement
G
Unsmooth movement → Repair or
replace.
EC4H4600
Bearing
1. Inspect:
Bearing 1
G
Rotate inner race with a finger.
Rough spot/seizure → Replace.
4 - 98
ENG