This is the way to go if you are serious about winning. Once your suspension is dialed in, and you are pretty well sorted out with your bike, it’s time to look at adding some more power. Starts are everything in racing. If you are getting “yanked” on the starts — it’s time to step up.

Modern four-stroke engines are remarkable things. These technological marvels are the ultimate in performance and reliability for average riders as well as racers. Large doses of torque and linear power delivery make four-strokes the number one choice for off-road racing. In recent years the weight and reliability of these engines have made great strides and today, four strokes are the obvious choice.

At Yoshimura, we have been building four-stroke racing engines for over 50 years. We understand that your engine is the sum of many parts. We do not simply throw a big cam in, pop up the compression, and create a time bomb. Depending on which stage of engine modification you choose, we build power at self-sustaining, balanced levels.