Yamaha YFM250RX 2008 Service Manual page 198

TRANSMISSION
4. Check:
• Transmission gear engagement
(each pinion gear to its respective wheel
gear)
Incorrect → Reassemble the transmission
axle assemblies.
NOTE: NOTE:
When reassembling the main axle, press the
2nd pinion gear
102.2 ~ 102.4 mm (4.02 ~ 4.03 in)
5. Check:
• Transmission gear movement
Rough movement → Replace the defective
part(s).
6. Check:
• Circlips
Bends/damage/looseness → Replace.
INSTALLING THE SHIFT FORKS AND SHIFT
DRUM ASSEMBLY
1. Install:
• Transmission
• Shift fork 1 (L)
• Shift fork 2 (C)
• Shift fork 3 (R)
• Shift drum assembly
• Shift fork guide bar
• Spacer
• Right crankcase
NOTE: NOTE:
• The embossed marks on the shift forks
should face towards the left side of the engine
and be in the following sequence: "L", "C", "R".
• The grooved side of the shift fork guide bar
should face towards the right side of the
engine.
2. Check:
• Shift cam operation
Unsmoothy operation → Repair.
NOTE: NOTE:
Check the transmission and shift forks for
smooth operation by turning the shift cam with
your hand.
4-82
ENG
onto it as shown.