JMS performance is fast becoming the leader in four stroke racing technology.
With our state-of-the-art dynamometer with EFI mapping capabilities JMS is setting the standard for performance and reliability.
Class leading stock and modified engines that meet current rules.
JMS supermini engines are top of the class in performance and reliability.
JMS can build you an engine package that is capable winning a national championship. So whether you're writing a Yamaha, Kawasaki, Suzuki KTM, or Honda JMS power can get you to the front and keep you there
Custom cylinder heads
Big bore cylinder and stroker kits