Stage 1: single-cam motor. Excellent midrange and top-end increase. Uses stock valve springs and rockers.
Made for
Yamaha 350 Wolverine 1995-2006
Yamaha BIG BEAR 400 2000-2006
Yamaha Big Bear 350 2000-2006
Yamaha Bruin 350 2004-2006
Yamaha KODIAK 400 1993-1999
Yamaha Kodiak 350 1993-1999
Yamaha Raptor 350 2005-2006
Yamaha Warrior 350 1987-2004