Yamaha Z200N Service Manual page 258

LOWR
BACKLASH (REGULAR ROTATION MODELS)
(6) Slowly turn the drive shaft clockwise
and counterclockwise. When the drive
shaft stops in each direction, measure
the backlash.
2. Adjust:
• Reverse gear shim
Remove or add shim(s).
Reverse gear
backlash
Less than
0.74 mm (0.029 in)
More than
1.29 mm (0.051 in)
M: Measurement
6-71
E
Shim thickness
To be increased by
(1.02 – M) × 0.54
To be decreased by
(M – 1.02) × 0.54