Checking The Pinion Gears; Selecting Middle Drive And Driven Gear Shims - Yamaha YXR70FX Service Manual

MIDDLE GEAR
7. Remove:
• middle driven shaft 1
(with bearing)
1
EBS01021

CHECKING THE PINION GEARS

1. Check:
• drive pinion gear teeth
• driven pinion gear teeth
Pitting/galling/wear → Replace.
2. Check:
• O-ring
Damage → Replace.
• bearings
Pitting/damage → Replace.
EBS00370
SELECTING MIDDLE DRIVE AND DRIVEN
GEAR SHIMS
When the drive and driven gear, bearing hous-
ing assembly and/or crankcase replaced, be
sure to adjust the gear shim 1, 2.
1. Select:
• middle drive gear shim 1
• middle driven gear shim 2
4 - 98
ENG