Introduced for the 2001 model year, this Yamaha motocross nameplate marked one of the company’s most important steps in the rise of modern four-stroke off-road racing. It was developed from Yamaha’s earlier breakthrough four-stroke competition machines and arrived as a lightweight 250cc-class racer aimed at bringing four-stroke power delivery and traction into the mainstream of motocross. From the start, it was positioned as a purpose-built race bike rather than a trail model, and it quickly became a reference point in the class.
The early years established the identity of the model: compact, competition-focused, and closely tied to Yamaha’s factory racing efforts. Yamaha continued refining it through successive updates, including major revisions to bodywork and chassis details in the early 2000s, a new aluminum frame era in the mid-2000s, and further handling-focused changes in later generations. Those updates helped keep the nameplate relevant as motocross technology moved toward lighter construction, sharper cornering behavior, and more sophisticated suspension and engine packaging.
Historically, the model is especially significant because it helped normalize the idea of a competitive four-stroke in a class long associated with two-strokes. It became a foundational machine in Yamaha’s off-road lineup and remains one of the brand’s best-known competition motorcycles. The nameplate has continued through many model-year updates without a documented discontinuation, making it an enduring part of Yamaha’s motocross heritage.