1990-2000 Yamaha RT100A Service Manual (P/N LIT-11616-07-35)

• Official 100-page Yamaha publication (P/N LIT-11616-07-35, first edition January 1990) for the 3UL-series build
• Covers 1990–2000 Yamaha RT100A motorcycles equipped with 97 cc 2-stroke air-cooled engines and 5-speed transmissions
• Features 15 high-resolution exploded-view diagrams mapping out engine, chassis, and transmission components
• Contains essential factory reference charts for any professional repair environment

What the Manual Documents

This OEM service manual delivers core technical documentation structured specifically for professional bay mechanics and serious DIYers. It outlines the exact factory specifications needed to maintain the 1990–2000 RT100A. Starting with machine identification and serial number tracking, the guide moves systematically through routine maintenance schedules. You will find exhaustive descriptive chapters on engine overhaul procedures. These sections analyze piston, cylinder, and clutch assemblies in deep detail. Need to know the carburetion setup? The text outlines the entire Mikuni VM22SS system. It also breaks down chassis components like the front fork, rear shock, steering head, and drive chain. Electrical coverage focuses strictly on the CDI magneto ignition and coil testing. Understanding these systems through original manufacturer literature is vital. Always rely on verified OEM data and proper workshop safety protocols during any physical repair to prevent equipment damage or personal injury.

Specification Highlights

Expect uncompromising technical depth throughout the documentation. For instance, it dictates a strict cylinder head warpage limit of 0.02 mm alongside a precise piston-to-cylinder clearance range of 0.050–0.055 mm. You get exactly the tolerances the factory floor used. The text also establishes a maximum crankshaft runout of 0.03 mm. When reassembling the lower end, the primary drive gear tightening torque is set firmly at 60 Nm (43 ft-lb). Routine fluid changes are covered as well, listing the exact transmission oil capacity at 0.65 liters.