2005-2008 Yamaha RS90/RS90R/RSG90/RST90 Snowmobile Service Manual

Technical Scope and Coverage

• Covers 2005–2008 Yamaha RS90, RS90R, RSG90, RS90M, RST90, and RST90TF series snowmobiles, including USA, Canada, and Europe model variants.
• Original OEM publication, first edition, providing technical specifications and maintenance data for the 8ES1–8FM2 serial number range.
• Contains 47 exploded-view diagrams and 650 pages of system maintenance specifications, engine assembly parameters, and electrical circuit diagrams.
• Delivered as a direct download the moment payment clears.
• Permanent availability in your purchase account — no re-buy required.
• Suitable for printing individual sections for shop-floor use.
• Full-text search finds any part number in seconds.
• This 650-page manual is the factory-authorized reference used for servicing the 973 cc liquid-cooled 4-stroke DOHC RS series engine architecture.

Service and Technical Overview

System Documentation

The manual documents standard maintenance for the engine, cooling system, and electrical components. Coverage includes detailed charts for engine oil capacity and filter requirements, as well as valve clearance adjustments for the three-cylinder engine. Electrical section details switch inspections, lighting system schematics, and charging system troubleshooting. The chassis documentation details steering system maintenance, ski alignment, and suspension adjustments for both front and rear configurations, including stoppers and dampening force.

Specification Highlights

Torque values are documented for key assembly points, such as the 13 Nm spark plug requirement and the 10 Nm camshaft cap bolt specification. Cooling system capacity is documented at 4.8 L for standard models, with specific variations for the RS90M reaching 6.3 L. Valve clearance for intake valves is specified at 0.15–0.22 mm. The 2005–2008 Yamaha RS90 and RS90R series engine assembly requires 10 Nm for camshaft cap bolts. An official 650-page Yamaha OEM workshop manual covering the 2005–2008 Yamaha RS90 and RSG90 series, documenting engine, chassis, electrical, and powertrain specifications for the 8ES1–8FM2 build range.