2009 Yamaha YFZ450RY Service Manual OEM (P/N LIT-11616-22-75)

This official 386-page factory publication (Part 18P-28197-10 / P/N LIT-11616-22-75) is the definitive technical reference for the 2009 18P1-series build. Designed for professional technicians and experienced DIY mechanics, it provides the exhaustive data required for maintaining, diagnosing, and rebuilding the 2009 Yamaha YFZ450RY ATV. Letting you take the exact pages you need directly to the workbench.

Technical Scope and Content

The manual details every major assembly, focusing on precise measurement, assembly, and disassembly procedures to maintain factory standards. It includes comprehensive sections on the liquid-cooled 4-stroke DOHC engine, the electronic fuel injection (EFI) system, and advanced electrical circuit diagnostics.

Prior to any component teardown or heavy diagnostic work, always review the factory safety guidelines and required equipment specifications detailed in the introductory chapters to ensure a secure workspace.

Inside this second edition (April 2009), you will find:

• 47 detailed exploded-view diagrams for quick parts identification
• 15 technical specification tables * 12 electrical system testing charts

Specification Highlights

The document covers all critical factory limits, allowing you to verify clearances and tolerances accurately. Key reference data includes:

• Valve Clearance: Intake: 0.10–0.15 mm | Exhaust: 0.20–0.25 mm
• Cooling System: Capacity: 1.25 L | Radiator Cap Opening Pressure: 107.9–137.3 kPa
• Transmission: Constant mesh 5-speed configuration
• Torque Values: Complete fastener torque charts, highlighting the 200 Nm rear axle nut specification
• Electrical Values: Stator coil resistance of 0.32–0.48 ohms and a battery capacity of 12 V at 6.0 Ah