The Triumph T120R Bonneville, produced in 1966, stands as an iconic British motorcycle, celebrated for its performance and classic roadster design. This model represents a significant era in motorcycling history, embodying the engineering prowess and distinctive style of Triumph. Its air-cooled, parallel-twin 649 cc engine, coupled with a 4-speed gearbox and chain drive, delivered an impressive approximate 46 horsepower, making it a formidable machine for its time. The T120R Bonneville is a highly sought-after classic, appealing to enthusiasts and restorers who appreciate its heritage and enduring appeal.

This comprehensive English-language Full Service Repair Manual provides essential information for the maintenance and repair of your 1966 Triumph T120R Bonneville. It covers all major systems, including complete engine overhaul procedures for the 650cc parallel-twin, detailed transmission service for the 4-speed gearbox, and comprehensive electrical system diagnostics with wiring diagrams. The manual also includes guidance on chassis and suspension, braking systems, fuel system tuning, and bodywork. With step-by-step instructions for routine maintenance, troubleshooting, adjustments, and rebuilding procedures, this manual is an indispensable resource for owners and technicians aiming to preserve the integrity and performance of this classic motorcycle.