Yamaha BT1100 2002 Service Manual page 280

SHAFT DRIVE
b. If it is necessary to increase the ring gear
backlash by more than 0.2 mm, reduce the
thrust washer thickness by 0.2 mm for every
0.2 mm increase of ring gear shim thickness.
c. If it is necessary to reduce the ring gear back-
lash by more than 0.2 mm, increase the thrust
washer thickness by 0.2 mm for every 0.2 mm
decrease of ring gear shim thickness.
Rig gear shims
Thickness (mm)
Thrust washers
Thickness (mm)
6-75
CHAS
0.25, 0.30, 0.40, 0.50
1.2, 1.4, 1.6, 1.8, 2.0