1987-2002 Yamaha YFS200 Blaster Factory Service Manual

• Covers the 1987–2002 Yamaha YFS200 Blaster (including the YFS200U variant) with technical specifications and service procedures
• Official Yamaha publication (P/N 2XJ-21771-E0), 1st Edition, October 1987
• 343 pages of comprehensive exploded-view diagrams, torque specification tables, and wiring schematics
• Serves as the foundational technical reference for the entire 15-year production run of the YFS200 platform, specifically covering the 2XJ-series build

Component and System Documentation

This service manual breaks down the mechanical and electrical systems of the air-cooled 2-stroke machine across eight core chapters. It details engine removal, cylinder head teardowns, piston inspection, and crankcase disassembly. You will also find comprehensive breakdowns for clutch and transmission overhauls. On the electrical side, the manual provides complete wiring diagrams for the ignition and lighting systems. Chassis sections clearly outline steering, suspension, and braking adjustments. Everything is organized logically to support efficient diagnostic workflows and troubleshooting in a professional or home shop environment.

Specification Highlights

Having accurate technical data is critical when rebuilding the 195 cc power plant or dialing in the chassis. This guide provides exact torque specifications, such as tightening cylinder head bolts to 27 Nm (20 ft-lb) and drive sprocket bolts to 10 Nm (7.2 ft-lb). It covers engine timing setup at 16° B.T.D.C. at 3,000 r/min and details precise tolerances like the intake reed valve thickness (0.35–0.49 mm). You will also find strict limits for crankshaft runout (0.03 mm) and the required piston-to-cylinder clearance (0.035–0.040 mm). Routine maintenance data, such as the 0.65-liter transmission oil capacity, is clearly charted for quick reference. Please note that these specifications are provided to illustrate the manual's depth; always ensure a certified technician oversees or performs any service work on this equipment to maintain operational safety.