The YZ-250F is an incredible machine that has set the standard for 250s since 2001. When Yamaha unleashed the first four-stroke 250cc race bike, it set the world on fire. We know from first-hand experience because we supported Larry Ward on a YZ-250F back when he rode for the Moto XXX racing team. Today, our engineers have logged countless dyno hours to extract every last bit of raw horsepower from the Yamaha 250. The end result is a Yoshimura exhaust that is perfectly balanced to mate with an already fierce engine.