The Yamaha YZ125, produced in 1989, stands as a notable motocross and off-road competition motorcycle, celebrated for its lightweight chassis, potent liquid-cooled 2-stroke engine, and advanced Monocross rear suspension. This model was a benchmark in its class during the late 1980s, known for aggressive styling and performance optimized for racing, placing it among competitors like the Honda CR125R, Suzuki RM125, and Kawasaki KX125. Its engineering focused on delivering a responsive and agile riding experience, making it a favored choice for enthusiasts and professional riders seeking a competitive edge.

This comprehensive factory service manual provides detailed guidance for the maintenance, repair, and troubleshooting of your 1989 Yamaha YZ125. It covers all essential systems, including the engine, fuel system, ignition, clutch, transmission, drivetrain, suspension, brakes, wheels, tires, frame, and electrical system. With step-by-step repair procedures, routine maintenance schedules, diagnostic flowcharts, and precise technical specifications, this manual is an indispensable resource for owners and technicians aiming to preserve the performance and longevity of this iconic competition machine.

The Yamaha YZ125, produced in 1989, stands as a notable motocross and off-road competition motorcycle, celebrated for its lightweight chassis, potent liquid-cooled 2-stroke engine, and advanced Monocross rear suspension. This model was a benchmark in its class during the late 1980s, known for aggressive styling and performance optimized for racing, placing it among competitors like the Honda CR125R, Suzuki RM125, and Kawasaki KX125. Its engineering focused on delivering a responsive and agile riding experience, making it a favored choice for enthusiasts and professional riders seeking a competitive edge.

This comprehensive factory service manual provides detailed guidance for the maintenance, repair, and troubleshooting of your 1989 Yamaha YZ125. It covers all essential systems, including the engine, fuel system, ignition, clutch, transmission, drivetrain, suspension, brakes, wheels, tires, frame, and electrical system. With step-by-step repair procedures, routine maintenance schedules, diagnostic flowcharts, and precise technical specifications, this manual is an indispensable resource for owners and technicians aiming to preserve the performance and longevity of this iconic competition machine.