Many tuners, in building their machines to compete, disregard longevity and dependability. At Pro Circuit, our goal is to get you the most for your money by providing you dependable, high performance service, while paying close attention to the most minute details.

Much has been written about the majesty of the engines of Pro Circuit. A few words can only capture the essence: they are the world’s most advanced four-stroke engines. Take the breath-taking performance of the Pro Circuit power, add to this the incredible efficiency, reliability and versatility. The result is an unsurpassed riding experience, with faster acceleration and stronger horsepower.

Exceeding demands, Pro Circuit redefines the term high performance
two-stroke engine modifications. Having had the privilege to work with
the most talented riders in the industry has allowed Pro Circuit to develop products and services that perform. This investment has qualified us to design and build your motorcycle or ATV, whether used for sport or race, to outlast and outperform the competition. Pro Circuit’s technical ability and precision in using flow bench and dyno technology, coupled with countless hours of field testing and racing, produces results.
Appreciating performance has never been so easy.

Before you send in your motor, download and fill out this Service Form. Send it with your engine. A sales representative will call you once its received to go over the work you want done. Allow 7-10 business days for head modifications (turn-around time may vary, depending on parts in stock). Once your work is completed, your sales rep will call you go over billing and shipping if it has not already been discussed.