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 road racing. In recent years the weight and reliability of these engines have made great strides and today, four strokes are the obvious choice.

Developing four-stroke power, however, is a study in incrementalism. All the reciprocating parts create friction and heat that detract from performance. As a result of this dynamic, building up the power is best approached in stages.

These engines are, in essence, many parts that together create a whole. If all the parts work in unison and in concert, large increases in reliable power occur. If only a few pieces of the whole are installed, you may create more problems than you will solve. All the pieces have to work together, or you will concentrate stress loads and other negatives into specific areas, possibly ending with a catastrophic engine failure.

At Yoshimura, we have been building four-stroke racing engines for over 60 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. There is no guessing here.

We recommend the use of VP Racing Fuels, and MOTUL chemicals and lubricants for all of our engine builds

FOR MORE INFORMATION CONTACT:

Rhett Lougheed
Engine Building Services

5420 Daniels St Chino, CA 91710
Phone: (909) 364-0186 ext: 301
E-mail: [email protected]

Don Franzen
Technical Sales Representative

5420 Daniels St, Chino, CA 91710
Phone: (909) 628-4722 ext: 422
E-mail: [email protected]