Yamaha YFM660FP Service Manual page 289

REAR CONSTANT VELOCITY JOINT/FINAL DRIVE GEAR
AND DRIVE SHAFT
Final gear lash adjustment
1.Remove:
Bearing housing 1
●
Ring gear shim(s) 2
●
Ring gear 3
●
Thrust washer 4
●
2.Adjust:
Gear lash
●
*****************************************************
Adjustment steps:
●
Select a suitable
washer(s) using the following chart.
Too little gear lash
Too large gear lash
●
If increased by more than 0.2 mm (0.008 in):
Reduce the thrust washer thickness by
0.2 mm (0.008 in) for every 0.2 mm of ring
gear shim increase.
●
If reduced by more than 0.2 mm (0.008 in):
Increase the thrust washer thickness by
0.2 mm (0.008 in) for every 0.2 mm that the
ring gear shim is decreased.
Ring gear shim
Thickness (mm)
Thrust washer
Thickness (mm)
*****************************************************
7 - 31
DRIV
shim(s) and thrust
Reduce shim thick-
ness.
Increase shim thick-
ness.
0.25 0.30 0.35
0.40 0.45 0.50
1.2 1.3 1.4
1.5 1.6 1.7
1.8 1.9 2.0
2.1