Yamaha YZ250(W)/W1 Owner's Service Manual page 366

TRANSMISSION, SHIFT CAM AND SHIFT FORK
EC4H4810
Shift fork, shift cam and segment
1. Inspect:
9 Shift fork 1
Wear/Damage/Scratches ¡ Replace.
2. Inspect:
9 Shift cam 1
9 Segment 2
Wear/Damage ¡ Replace.
3. Check:
9 Shift fork movement
Unsmooth operation ¡ Replace shift fork.
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
EC4H5242
Transmission
1. Install:
9 5th pinion gear (21T) 1
9 3rd pinion gear (18T) 2
9 Collar 3
9 4th pinion gear (22T) 4
9 2nd pinion gear (15T) 5
To main axle 6.
NOTE:
Apply the molybdenum disulfide oil on the inner
and end surface of the idler gear and on the
inner surface of the sliding gear, then install.
4-74
ENG