This manual covers the motorcycles from the 2010 model year. These performance-oriented, liquid-cooled, 2-stroke single-cylinder off-road competition motorcycles are built upon a rich motorsports heritage. Known for their powerful engines, with displacements of 84 cc for the 85 and 99 cc for the 100, and agile chassis, these models are designed for motocross racing and spirited off-road riding. The series is consistently praised for its competitive performance and reliability within the mini-motocross segment, offering a strong foundation for aspiring racers and enthusiasts. This comprehensive digital service/repair manual provides detailed, workshop-level information essential for the maintenance and repair of your 85 or 100. It covers a wide range of systems, including general information, fuel and cooling systems, engine components (top end, right side, bottom end, transmission), wheels, tires, final drive, brakes, suspension, steering, frame, and the electrical system. The manual includes step-by-step instructions, diagrams, torque specifications, fluid capacities, and diagnostic procedures, making it an invaluable resource for owners and technicians to ensure optimal performance and longevity of the vehicle.