2002-2008 Yamaha ATV YFM660F (Grizzly 660) Service Manual

2002–2008 Yamaha Grizzly 660 Technical Scope

• Covers 2002–2008 Yamaha Grizzly 660 (YFM660F) featuring the 660 cm3 liquid-cooled 4-stroke SOHC engine and V-belt automatic transmission
• Official Yamaha publication P/N 90890-01309, Grizzly 660 Compendium Division
• Contains 80+ mechanical exploded-view diagrams and specialized maintenance torque tables for all critical engine and chassis fasteners
• Delivers as a direct download the moment payment clears
• Stored against your account so you can retrieve it after a hard-drive loss
• Full-text search finds any part number in seconds
• Laid out for standard letter and A4 printing
• This 466-page factory manual serves as the primary technical reference for the entire 2002–2008 YFM660F production run, including specialized 4WD and differential lock system diagnostics

Operational and Service Documentation

This 466-page Yamaha factory publication provides deep technical insights into the 2002–2008 Yamaha Grizzly 660 drivetrain, chassis, and electrical systems. The content spans from fundamental machine identification to detailed component analysis, covering the 5KM-series engine architecture and the 3-axle transmission mechanism. Sections detail the lubrication points, coolant flow paths, and oil flow diagrams, alongside the unique parking-position shift mechanism introduced with this model. Detailed chapters guide the reader through the periodic maintenance schedule, electrical circuit troubleshooting, and high-level internal engine evaluations.

Specification and Reference Highlights

Technical specifications provided for the Yamaha Grizzly 660 cover critical clearances, fastener torque ratings, and fluid capacities essential for maintenance. Cylinder head bolt torque values are documented at 38 Nm, while critical spark plug gap settings are listed at 0.8–0.9 mm. Coolant system capacity is documented at 1.8 liters, and the engine oil capacity for a periodic change is specified at 1.9 liters. The manual also includes what an OEM service publication covers regarding differential gear backlash settings, which are specified at 0.05–0.25 mm. These values assist in maintaining factory-standard performance levels. An official 466-page Yamaha OEM workshop manual covering the 2002–2008 Yamaha Grizzly 660, documenting engine, chassis, electrical, and drive system specifications for the YFM660F model series.