Yamaha YZ250N Owner's Service Manual page 356

TRANSMISSION, SHIFT CAM AND SHIFT FORK
EC4H4810
Shift fork, shift cam and segment
1. Inspect:
9Shift fork 1
Wear/Damage/Scratches
2. Inspect:
9Shift cam 1
9Segment 2
Wear/Damage
3. Check:
9Shift fork movement
Unsmooth operation
NOTE:
For a malfunctioning shift fork, replace not only
the shift fork itself but the two gears each adja-
cent to the shift fork.
EC4H5000
ASSEMBLY AND INSTALLATION
EC4H5241
Transmission
1. Install:
95th pinion gear (21T) 1
93rd pinion gear (18T) 2
9Collar 3
94th pinion gear (22T) 4
92nd pinion gear (16T) 5
To main axle 6.
NOTE:
9Apply the molybdenum disulfide oil on the 4th
and 5th pinion gears inner circumference and
on the end surface.
9Apply the molybdenum disulfide oil on the 2nd
and 3rd pinion gears inner circumference.
4-73
ENG
Replace.
Replace.
Replace shift fork.