Yamaha YZ250(W)/W1, Owner'S Service Manual

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4-74
TRANSMISSION, SHIFT CAM AND SHIFT FORK
ENG
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.
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.
2. Inspect:
9 Shift cam
1
9 Segment
2
Wear/Damage
→
Replace.
EC4H4810
Shift fork, shift cam and segment
1. Inspect:
9 Shift fork
1
Wear/Damage/Scratches
→
Replace.
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