The RR 4T represents a line of versatile four-stroke off-road motorcycles, known for their Italian engineering and performance capabilities. Available in various engine displacements, including 250cc, 400cc, 450cc, and 525cc, these models are designed for demanding off-road use, from trail riding to competitive enduro. Motorcycles have a heritage rooted in off-road racing, and the RR 4T series embodies this with a focus on rider control, robust construction, and reliable power delivery across different terrains. This comprehensive workshop repair service manual provides essential information for the maintenance, service, and repair of RR 4T motorcycles. It covers a wide array of systems, including the engine, fuel system, cooling, drivetrain, brakes, suspension, steering, electrical components, and more. With detailed procedures, diagnostic information, and numerous illustrations, this manual is an indispensable resource for owners, DIY mechanics, and professional technicians seeking to maintain or repair their RR 4T, ensuring optimal performance and longevity.