Yamaha YZ450F(V), Owner'S Service Manual

Page: 434 / 650

4 - 97
ENG
TRANSMISSION, SHIFT CAM AND SHIFT FORK
EC4H4801
Shift fork, shift cam and segment
1. Inspect:
• Shift fork
1
Wear/damage/scratches
→
Replace.
2. Inspect:
• Shift cam
1
• Segment
2
Bend/wear/damage
→
Replace.
3. Check:
• 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.
ASSEMBLY AND INSTALLATION
Transmission
1. Install:
• 5th pinion gear (21T)
1
• 3rd pinion gear (18T)
2
• Collar
3
• 4th pinion gear (22T)
4
• 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.