This manual covers the sportbike motorcycles, produced from the mid-1980s to the early 1990s. These models are recognized for their approachable performance, sporty styling, and hallmark engineering precision. The CBR250 Four distinguished itself with a high-revving inline-four engine, while the CBR250R offered a parallel-twin configuration, both designed to provide an engaging riding experience for enthusiasts and commuters alike. Their compact displacement and balanced chassis made them popular choices in the quarter-liter sportbike segment, embodying a commitment to quality and reliability.

This Service Manual provides comprehensive mechanical and electrical service information essential for the maintenance and repair of your sportbike or sportbike. It details procedures for engine overhaul, fuel and cooling systems, transmission, brakes, suspension, and the electrical system, including detailed wiring diagrams and troubleshooting guides. The manual also includes routine maintenance schedules, special tool identification, and precise technical specifications such as torque values and component clearances. This resource is invaluable for owners, technicians, and mechanics seeking to preserve the performance and longevity of these classic sportbikes.