1983-1986 Yamaha YTM/YFM200 & YTM225 Service Manual

Yamaha YTM/YFM200 and YTM225 Technical Documentation

• Covers 1983–1986 Yamaha YTM200, YFM200, and YTM225 all-terrain vehicles, including chain-drive and shaft-drive variants.
• Third-party publication, Clymer edition.
• Contains 91 indexed figures, 8 detailed technical specification tables, and 13 chapters encompassing complete engine and chassis data.
• Downloads to your account within seconds of checkout.
• Stored against your account so you can retrieve it after a hard-drive loss.
• Suitable for printing individual sections for shop-floor use.
• Cross-reference lookup works via the built-in search.
• This 1983-1986 publication serves as the primary reference for the K, L, N, and DX-series frame numbering sequences.

Document Structure and Technical Scope

The 1983-1986 Yamaha YTM200/YFM200/YTM225 service manual offers a detailed exploration of engine principles, routine maintenance, and system diagnostics for these off-road machines. It begins by outlining safety-first shop practices, essential hand tool selection, and standard bolt-identification techniques. The text then transitions into periodic lubrication schedules, valve clearance adjustments, and carburetor fuel level settings designed to keep the 4-stroke overhead-camshaft engine performing within factory tolerances.

Subsequent chapters delve into the clutch and transmission assemblies, along with electrical system troubleshooting involving CDI ignition units and electric starting components. Suspension and steering sections detail maintenance requirements for both YTM-series and YFM-series front fork configurations and rear drive axle systems. The document concludes with exhaustive wiring diagrams and an index, providing a complete technical overview of the YTM/YFM series for owners and technicians.

Engine and Chassis Data Preview

Detailed specifications are provided throughout the text, including specific tightening torques for cylinder head bolts at 22 Nm (16 ft-lb) and M8 flange bolts at 22 Nm (16 ft-lb). Engine oil capacity is documented at 1,500 cc during a standard change, increasing to 1,800 cc after a complete overhaul. Valve clearance for the intake is listed at 0.05–0.09 mm in the tune-up specification table. The standard compression pressure for the single-cylinder engine is 9 kg/cm² (128 psi) at normal operating conditions. Brake specifications include a front drum inside diameter of 110 mm with a 111 mm wear limit.

Reference only — always consult a certified technician before performing service on this equipment. An official-style 288-page Clymer workshop manual covering the 1983–1986 Yamaha YTM200, YFM200, and YTM225, documenting engine, chassis, electrical, and fuel-delivery specifications for all factory-produced model variants.