Yamaha 2002 YB50, Service Manual

Page: 67 / 161

ENG
INSPECTION AND REPAIR
4-16
TRANSMISSION
1. Inspect:
• Drive axle
• Main axle
• Secondary pulley wheel axle
Burrs/Spalling/Non-uniformity/Wear
Change
2. Inspect:
• Secondary pulley wheel axle bearing
• Main axle bearing
• Drive axle bearing
Pivot the inner guide of the bearing.
Excessive play/Non-uniformity
Change
Pitting/Damage
Change
AUTOLUBRICATION PUMP
Internal wear or poor operation may cause
the pump to deviate from its factory adjust-
ment. However, this is very uncommon. If
incorrect operation is suspected, inspect the
following:
1. Inspect:
• Supply line Obstruction Apply air
under
pressure
• O-ring Wear/Damage Change
2. Inspect:
• Drive gear teeth of the autolubrication
pump
• Gear teeth driven by autolubrication
pump Pitting/Wear/Damage
Change
CRANKSHAFT
1. Measurement:
• Deflection limit “C”
• Clearance on big end side “D”
• Limit of free play at small end of connec-
ting rod “F”
Outside specified value
Change.
Use V blocks, dial gauges and thickness
gauge.