2002-2006 Yamaha Grizzly 660 YFM660 Factory Service Manual

• Covers 2002–2006 Yamaha Grizzly 660 YFM660 (YFM660F) 4x4 all-terrain vehicles
• Documents specific details for the 5KM1 and 5KM5 model variants released during this production cycle
• Contains 404 pages of technical information, including exploded diagrams, wiring schematics, and complete torque tables
• Outlines maintenance baselines, electrical parameters, chassis dimensions, and engine systems

Document Content Overview

When tracking down an electrical fault or rebuilding the top end of a Grizzly 660, having exact reference data makes the job much smoother. This documentation breaks down the machine identification and technical specifications for the YFM660 platform, including vital clearances and capacities. It is structured to give you clear visibility into the engine internals, cooling system, and carburetion components, alongside extensive drivetrain and chassis maintenance data. A dedicated section covers periodic checks and adjustments, ensuring that technical values for valve clearances, fluid levels, and electrical system diagnostics are easy to locate. Since working on heavy ATVs involves mechanical risks, always double-check these values and follow standard safety practices before servicing any drivetrain or suspension components.

Specification Highlights

Having the right numbers readily available saves time in the shop. For the YFM660F, the engine oil capacity for a periodic change is 1.9 liters. The intake valve clearance for this 660 cc powerplant is configured strictly between 0.10 and 0.15 mm. Electrical systems are built around a 12 V 18 AH battery capacity. Looking at the final drive, the gear oil periodic change takes 0.28 liters. The cooling system reservoir capacity is set at 0.30 liters, while the front suspension wheel travel is engineered to maintain a dimension of 170 mm.