The 2009 RM85 is a second-generation motocross motorcycle renowned for its lightweight, nimble, and performance-oriented design, targeting entry-level to intermediate riders in motocross competition. Building on a rich heritage in motocross, the RM85 evolved from the successful RM80, incorporating significant enhancements to its engine, chassis, and suspension for superior handling and competitive edge. This liquid-cooled, 2-stroke, reed valve machine, with its 104 cc displacement, offers an approximate horsepower of 20-25 HP, making it a potent contender against rivals like the Kawasaki KX85, Yamaha YZ85, and Honda CR85R. Its robust construction, featuring a semi-double cradle steel frame and hydraulic disc brakes, underscores a commitment to engineering quality and reliability in the demanding world of motocross. This workshop service repair manual provides comprehensive, dealership-level technical information essential for the maintenance, service, diagnosis, and repair of the 2009 RM85. It covers all critical systems, including the engine, transmission, fuel system, cooling system, electrical components, chassis, suspension, and bodywork, with detailed step-by-step instructions and troubleshooting guides. Owners and technicians will find detailed procedures for periodic maintenance, component overhaul, and performance tuning, along with vital technical specifications and wiring diagrams. The manual is designed to empower users with the knowledge needed to keep their RM85 in optimal condition, ensuring peak performance and longevity on the track.