The 1985 Yamaha Trials TY350 is a competition trials motorcycle engineered for demanding off-road performance. This model embodies a lightweight, nimble, and robust design, optimized for the precise control and durability required in extreme trials riding conditions. Built upon Yamaha's strong motorsports heritage, the TY350 offered a significant step up in power and torque compared to its predecessors, making it a competitive choice in the mid-1980s off-road segment, rivaling other prominent trials bikes of its era. Its design philosophy focused on delivering rider confidence and mechanical reliability across challenging terrain.

This factory service manual provides comprehensive diagnostics, maintenance, repair, and overhaul procedures for the 1985 Yamaha Trials TY350. It covers essential systems including the engine, fuel system, ignition, transmission, clutch, suspension, brakes, and electrical components, offering detailed guidance for everything from routine servicing to complete engine rebuilds. The manual includes clear wiring diagrams, troubleshooting flowcharts, and specific instructions for adjustments and part replacements. Its comprehensive scope is designed to assist both DIY enthusiasts and professional technicians in maintaining and repairing the vehicle to factory standards, ensuring optimal performance and longevity.