Yamaha WR250F Manuel D'atelier page 466

TRANSMISSION, SHIFT CAM AND SHIFT FORK
EC4H4810
Shift fork, shift cam and segment
1. Inspect:
Shift fork 1
G
Wear/damage/scratches → Replace.
2. Inspect:
Shift cam 1
G
Segment 2
G
Wear/damage → Replace.
3. Check:
Shift fork movement
G
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
Transmission
1. Install:
5th pinion gear (27T) 1
G
3rd pinion gear (21T) 2
G
Collar 3
G
4th pinion gear (24T) 4
G
2nd pinion gear (16T) 5
G
To main axle 6.
NOTE:
Apply the molybdenum disulfide oil on the
G
4th and 5th pinion gears inner circumference
and on the end surface.
Apply the molybdenum disulfide oil on the
G
2nd and 3rd pinion gears inner circumfer-
ence.
4 - 99
ENG