This manual covers the Triumph TR25W, a lightweight British sports motorcycle produced for the model years 1968, 1969, and 1970. Known for its simple design and sporty handling, the TR25W features a 250cc parallel-twin, air-cooled engine, embodying Triumph's legacy of producing engaging and accessible motorcycles. Its engineering quality and reliability, characteristic of the era's British motorcycle manufacturing, made it a competitive offering in its segment.

This factory-authorized service manual provides comprehensive guidance for the service and repair of the Triumph TR25W. It details procedures for the engine, fuel system, ignition, transmission, suspension, brakes, electrical systems, and frame. The manual includes preventative maintenance schedules, troubleshooting guides, repair procedures, and assembly instructions, ensuring owners and technicians can effectively maintain and restore this classic motorcycle.