The 1998 60 SX and 65 SX are high-performance motocross and off-road motorcycles designed for junior riders. Known for their lightweight chassis, potent two-stroke engines, and robust build quality, these models embody the 'Ready to Race' philosophy. They offer adjustable suspension and a focus on delivering competitive performance in their class, making them ideal for learning and racing. An extensive heritage in off-road competition underpins the engineering and capabilities of these capable machines. This comprehensive factory service manual provides in-depth coverage of engine repair and maintenance for the 1998 60 SX and 65 SX. It details complete engine disassembly and reassembly, including the top and bottom ends, carburetion, ignition, clutch, and gearbox. The manual includes step-by-step instructions, torque specifications, special tool requirements, diagnostic procedures, and troubleshooting guides. It is an essential resource for technicians and owners aiming to maintain and repair these motorcycles, ensuring optimal performance and longevity.