YZ490

The Yamaha YZ490, produced from 1981 to 1990, represents a significant era in motocross engineering, known for its powerful 2-stroke, single-cylinder engine delivering approximately 40-50 HP and a displacement of around 484.5 cc. This premier open-class machine evolved throughout the decade, focusing on enhancing power delivery and suspension performance, solidifying Yamaha's strong heritage in off-road racing. Its robust steel frame and advanced suspension systems, including telescopic front forks and adjustable rear shocks, were designed for the demanding conditions of competition. Key features of the YZ490 include its carbureted fuel system, typically utilizing Mikuni carburetors, and an electronic CDI ignition system, all contributing to its formidable presence on the track.

This manual covers the YZ490, a powerful off-road motorcycle renowned in the motocross category. Produced from 1981 through 1990, the YZ490, with chassis codes ranging from YZ490H to YZ490B, represented a commitment to high-performance dirt bikes. Its engineering quality is reflected in its robust 2-stroke, single-cylinder engine and durable steel frame, designed for competitive racing and demanding terrain. The YZ490 is characterized by its raw power and agility, making it a significant machine in the history of motocross.

The Yamaha YZ490, a celebrated model produced from 1981 through 1990, represents a significant era in open-class motocross and desert racing. Known for its formidable power and torque, this second-generation YZ490 was a dominant force, embodying Yamaha's extensive legacy in off-road competition. Its robust design, featuring a 2-stroke, liquid-cooled 485 cc engine and a durable steel frame, made it a championship-winning machine. This manual covers various chassis codes including 4R4, 1LX, 1RW, 2WF, and 2TM, reflecting the evolution and variations of this iconic dirt bike.

This workshop service repair manual covers Yamaha YZ490 models produced between 1981 and 1990. The YZ490 is a powerful two-stroke, single-cylinder motocross bike, known for its competitive performance in the open class during its era. It features an air-cooled engine, a 5-speed transmission, a wet multi-plate clutch, and advanced suspension systems designed for off-road terrain. While not equipped with modern electronic aids or infotainment, its robust engineering and focus on raw power have made it a significant model in Yamaha's motorsport legacy.

This manual pertains to the 1982 YZ490, a significant motocross motorcycle renowned for its powerful 485cc two-stroke engine and robust performance. Developed by a brand with a rich heritage in off-road racing, the YZ490 represented a key advancement in open-class motocross technology during its era. Its design, featuring reed valve induction, an expansion chamber exhaust, and a 5-speed transmission, contributed to its reputation for raw power and competitive capability on the track. The chassis code common for this model is 4G0.

This manual covers the 1984 YZ490L, a celebrated motocross and off-road racing machine renowned for its powerful two-stroke engine and competitive performance. As a top-tier offering in the 500cc class, the YZ490 competed directly with other leading brands, distinguishing itself through its robust chassis and potent engine characteristics. This model represents a significant iteration within the esteemed YZ series, built upon a legacy of motorsports innovation and engineering excellence.

The 1988 Yamaha YZ490 is a high-performance motocross motorcycle, a key player in Yamaha's long-standing legacy of off-road racing success. As part of the second-generation YZ series, this model is renowned for its raw power and competitive edge, designed for dedicated motocross racers and off-road enthusiasts. Built with a robust steel frame and featuring Yamaha's signature Monocross rear suspension, the YZ490 offers a potent blend of performance and durability, aiming to provide a commanding presence on the track.