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Yamaha YZ450FW Manuel D'atelier Du Proprietaire page 434

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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.
4 - 97
ENG

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