2000-2008 Polaris 120 / 120 XC SP Youth Snowmobile Service Manual (P/N 9921077)

• Covers 2000–2008 Polaris 120 and 120 XC SP youth snowmobile models equipped with the 121cc Fuji 4-stroke engine
• Official Polaris publication P/N 9921077, © 2007
• Includes 11 technical exploded-view diagrams, 3 torque-specification tables, and 2 complete electrical wiring schematics
• This 79-page factory manual serves as the primary technical reference for the 120cc engine series spanning the 2000–2008 production cycle
• Details step-by-step procedures for track tensioning, ski toe alignment, carburetor jetting, brake cable calibration, drive chain adjustment, centrifugal clutch service, and skag replacement
• Outlines comprehensive maintenance routines for recoil starter rebuilds, Fuji 121cc engine overhauls, IFS shock installation, rail slide inspection, radius rod replacement, RPM limiter testing, and ignition timing verification

Component and System Documentation

This 2000–2008 Polaris 120 youth snowmobile service guide provides an expert overview of the machine's primary mechanical and electrical systems. Delivered as a PDF, the document structures information by chapter, beginning with detailed model specifications, general maintenance protocols, and safety labeling. For the professional workshop, having precise altitude jetting charts and engine clearances readily available significantly speeds up the diagnostic workflow. It also features step-by-step instructions for labor-intensive jobs like Mikuni BV 18 carburetor overhauls, recoil starter rewinding, and track alignment, which typically demand an expensive repair at the dealership. Further chapters focus on the Fuji 121cc engine, covering its removal, teardown, assembly, and de-compression system operation, followed by specific sections for the carburetor, recoil starter, clutch, and fuel delivery circuits.

Subsequent chapters document the body and steering geometry, including inspection, adjustment, and component replacement for tie rods, spindles, and IFS shock assemblies. The rear suspension segment outlines the removal, assembly, and drive-system maintenance, including driveshaft and rail-slide requirements. Working on youth snowmobiles involves inherent mechanical risks, such as high-temperature exhaust components and moving drive tracks; always verify vehicle stability on a secure stand and allow the exhaust system to cool completely prior to performing any inspections. The manual concludes with an electrical system section that includes comprehensive wiring diagrams and detailed troubleshooting guidance for all 2000–2008 model variants, ensuring an efficient repair process.

Specification and Reference Data

Technical data is presented throughout to aid in the verification of components. Valve clearance for the intake and exhaust is listed at 0.08–0.12 mm in the engine assembly table. Spark plug gap for the 121cc engine is documented at 0.70 mm. The clutch fastener requires 10 ft.lb of torque for assembly. All service data shown here is for reference only — qualified technicians and the original OEM documentation remain the authoritative source for any hands-on work. This factory-issued Polaris 120 service guide documents specifications, maintenance, and teardown procedures for the 2000–2008 youth snowmobile model range.