This manual covers the 450 Scrambler, a versatile motorcycle produced between 1967 and 1970. As part of a historically significant Scrambler line, this model offered a blend of on-road usability and capability for light off-road excursions, reflecting a popular trend in the American market during its production era. The 450 Scrambler is characterized by its single-cylinder, four-stroke engine, typically featuring a 436 cc displacement and a 5-speed gearbox. Its engineering quality and reliability, hallmarks of heritage, are supported by the detailed information contained within this comprehensive service repair manual. This factory service repair manual provides extensive guidance for owners, mechanics, and restoration specialists of the 450 Scrambler. It encompasses all essential systems, including the engine (fuel system, cooling, top end, lubrication, removal/installation), clutch, crankshaft, transmission, wheels, tires, final drive, brakes, suspension, steering, frame, and electrical system. The manual offers step-by-step maintenance procedures, advanced troubleshooting, detailed repair instructions, diagnostics, and tuning information, all supported by numerous illustrations, drawings, photos, and wiring diagrams. Its purpose is to facilitate the proper upkeep, repair, and optimal performance of the vehicle.