2007 Yamaha RS90K, RS90RK, RSG90K, RS90MK, RST90K, RST90TFK Snowmobile Service Manual (P/N LIT-12618-02-38)
688 Pages • 25.09 MB • Instant, Printable PDF
Yamaha Models Covered & Key Technical Specifications
Models: RS90K, RS90RK, RSG90K, RS90MK, RST90K, RST90TFK
Sub-models / Variants: RS90R, RSG90, RST90, RST90TF, USA/Canada model, Europe model
Model Year: 2007
Technical Data:
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Engine idle speed: 1,300–1,500 r/min
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Spark plug gap: 0.7–0.8 mm (0.028–0.031 in)
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Spark plug torque: 13 Nm (9.4 ft-lb)
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Engine oil capacity (periodic change): 2.8 L (3.0 US qt)
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Engine oil capacity (with filter change): 3.0 L (3.2 US qt)
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Coolant (RS90/RS90R/RSG90 total): 4.8 L (5.07 US qt)
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Standard V-belt height: -0.5 to 1.5 mm
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New belt width: 34.5 mm (1.36 in)
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Drive chain adjusting locknut torque: 25 Nm (18 ft-lb)
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Rear axle nut torque (RS90/RS90R/RSG90/RS90M/RST90): 75 Nm (54 ft-lb)
Yamaha Manual Features & Content Preview
- Official Yamaha publication (P/N LIT-12618-02-38), first edition May 2004.
- Covers 2007 RS90K, RS90RK, RSG90K, RS90MK, RST90K, and RST90TFK snowmobile variants.
- 688 pages of detailed diagrams, technical charts, and maintenance specifications.
Workshop Utility and Manual Structure
This factory-authorized manual is structured into nine primary chapters to streamline your workflow in the shop. It delivers the exact factory specifications used for the entire RS90 platform. Sections progress logically from general machine identification and essential tool lists to deep-dive mechanical data.
You will find comprehensive data covering engine maintenance, cooling system upkeep, and drivetrain adjustments. Specific chassis sections break down the steering and suspension configurations for the RS90, RS90M, and RST90 platforms. Power train segments isolate the primary and secondary sheave systems, drive V-belt, and chain housing assembly. For rapid diagnostics, the electrical chapters provide clear circuit diagrams for starting, charging, lighting, and grip warmer systems.
Specification and Technical Preview
Fast access to accurate specs is critical when a machine is on the lift. This documentation includes highly specific data points for tuning and teardowns. Engine cooling system maintenance outlines exact filling and bleeding procedures, noting the 6.3 L total coolant capacity for the RS90M. The cylinder head specification table lists intake valve clearance at 0.15–0.22 mm. Base engine health checks can be verified against the documented sea-level compression pressure of 1,450 kPa at 400 r/min. You will also find extensive charts for carburetor tuning, including elevation-based main jet selections.
Always consult this original OEM documentation alongside standard workshop safety protocols before beginning any hands-on maintenance. Proper protective gear and strict adherence to documented torque values are essential to ensure safe vehicle operation and prevent equipment damage.
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