Yamaha YFM660FS, Supplementary Service Manual

Page: 359 / 478

7 - 31
DRIV
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 shim(s) and thrust
washer(s) using the following chart.
●
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.
*****************************************************
Too little gear lash
Reduce shim thick-
ness.
Too large gear lash
Increase shim thick-
ness.
Ring gear shim
Thickness (mm)
0.25 0.30 0.35
0.40 0.45 0.50
Thrust washer
Thickness (mm)
1.2 1.3 1.4
1.5 1.6 1.7
1.8 1.9 2.0
2.1