2009 Yamaha YFZ450RY Service Manual

2009 Yamaha YFZ450RY Service Documentation

• Covers the 2009 Yamaha YFZ450RY all-terrain vehicle, documenting the liquid-cooled 4-stroke DOHC engine, electronic fuel injection (FI) system, and chassis maintenance specs
• Official Yamaha publication P/N LIT-11616-22-75, second edition April 2009
• Contains 47 detailed exploded-view diagrams, 15 technical specification tables, and 12 electrical system testing charts
• Accessible from your device as soon as the order is placed
• Permanent availability in your purchase account — no re-buy required
• Laid out for standard letter and A4 printing
• Full-text search finds any part number in seconds
• This second edition is the authoritative reference for the 2009 18P1-series build, providing essential torque, fluid, and mechanical clearance data

Technical Scope and Content

This factory publication provides a professional-level technical overview of the 2009 Yamaha YFZ450RY. The document details engine and chassis components, focusing on correct assembly, disassembly, and measurement procedures. Content includes exhaustive chapters on the fuel injection system, cooling system, and electrical circuit diagnostics, ensuring technicians have the required identification data to maintain factory standards.

Specification Highlights

Specifications documented include valve clearance (intake: 0.10–0.15 mm; exhaust: 0.20–0.25 mm) and cylinder head warpage limits. The cooling system capacity is listed at 1.25 L, with a radiator cap opening pressure range of 107.9–137.3 kPa. The transmission system specifies a constant mesh 5-speed configuration, and the document includes a thorough table of torque values for major fasteners, such as the 200 Nm specification for the rear axle nut. Electrical reference values are provided, including the stator coil resistance of 0.32–0.48 ohms and a battery capacity of 12 V at 6.0 Ah. An official 386-page Yamaha OEM workshop manual covering the 2009 Yamaha YFZ450RY, documenting engine, chassis, electrical, and fuel-injection specifications for the 18P1-series build.