Complete workshop & service manual with electrical wiring diagrams for Yamaha YN50 2002. It's the same service manual used by dealers that guaranteed to be fully functional and intact without any missing page.

This Yamaha YN50 2002 service & repair manual (including maintenance, overhaul, disassembling & assembling, adjustment, tune-up, operation, inspecting, diagnostic & troubleshooting…) is divided into different sections. Each section covers a specific component or system with detailed illustrations. A table of contents is placed at the beginning of each section. Pages are easily found by category, and each page is expandable for great detail. The printer-ready PDF documents work like a charm on all kinds of devices.

EXCERPT:
INSPECTION AND REPAIR (ENG)
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 adjustment.
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 auto lubrication pump
• Gear teeth driven by auto lubrication
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 connecting rod “F”
Outside specified value -> Change.
Use V blocks, dial gauges and thickness gauge.