Complete workshop & service manual with electrical wiring diagrams for Yamaha YJ125S 2003. It's the same service manual used by dealers that guaranteed to be fully functional and intact without any missing page.

This Yamaha YJ125S 2003 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:
TABLE OF CONTENTS
GENERAL INFORMATION
SPECIFICATIONS
PERIODIC CHECKS AND
ADJUSTMENTS
CHASSIS
ENGINE
CARBURETOR
ELECTRICAL SYSTEM
TROUBLESHOOTING
…
CHECKING THE CYLINDER HEAD
1. Eliminate:
combustion chamber carbon deposits (with a rounded scraper)
NOTE:
Do not use a sharp instrument to avoid damaging or scratching:
spark plug bore thread valve seats
2. Check:
cylinder head
Damage/scratches -> Replace.
3. Measure:
cylinder head warpage
Out of specification -> Resurface the cylinder head.
…