HONDA YAMAHA KAWASAKI SUZUKI KTM
ENGINE KITS
NEW PRODUCTS
YZ 250 POWERVALVE ADJUSTERS
Billet components to help increase top end power
LATEST NEWS
SUPERMINI UPDATES
YZ 103, CR103 redeveloped with significant improvements thru the entire power band
CRF 250 development
Continues 4.5 horsepower
Increase so far and still
Going
JMS PERFORMANCE
JMS ENGINE KITS ARE DYNO DEVLOPED AND
TRACK TESTED. ALL
ENGINE KITS ARE AMA LEGAL
