Yamaha NEOS 50 YN50 (2002) [67/161] Inspection and repair

Yamaha NEOS 50 YN50 (2002) [67/161] Inspection and repair
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.

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