1985-1988 Yamaha YFM200 Moto-4 Service Manual

Official Yamaha YFM200 Moto-4 Documentation

• Covers 1985–1988 Yamaha YFM200 Moto-4, including YFM200N, DXS, DXT, and U variants
• Original OEM publication P/N LIT-11616-YF-20, first edition April 1984
• Features comprehensive engine overhaul exploded-view diagrams, transmission gear lash settings, and electrical system schematics
• Accessible from your device as soon as the order is placed
• Indexed PDF search covers every chapter and appendix
• No DRM restrictions on the print function
• This 1984 first edition serves as the foundational service reference for the initial release of the shaft-drive Moto-4 series

Technical Scope and Structure

This 1985–1988 Yamaha YFM200 Moto-4 service manual provides the complete technical foundation for maintaining the 196.3 cm³ engine and chassis systems. The chapters define standard practices for periodic inspections, engine removal, and detailed overhaul sequences for the secondary and primary clutch, balancer assembly, and gear-drive reverse system. Additional sections document chassis maintenance, including front and rear brake adjustment, steering system inspections, and tire maintenance parameters for the 22x8-10 and 22x11-8 sizing requirements.

Specification Highlights

This document acts as an official workshop manual for Yamaha ATV maintenance, detailing necessary tolerances for wear-limit assessment and performance verification. Cylinder head warpage limits are specified at 0.03 mm in the inspection data. The middle gear lash standard is documented at 0.1–0.2 mm for radial clearance calibration. Final-stage torque for the clutch-boss securing nut is listed at 50 Nm (36 ft-lb). Engine oil capacity during periodic changes is rated at 1.5 liters using 20W40 SE grade lubricant. The standardized gap for spark plug electrode spacing is 0.6–0.7 mm.