Cylinder head for TBI motorcycles Extreme kit: Changes the compression ratio to obtain a uniform power transfer, improves grip and control of the engine, especially important in technical terrain. The design of the cylinder head manages to lower the temperature by eliminating the hot spots typical of the original cylinder heads. Ideal for extreme riding, and for thrill seekers in riding improves the throttle feel. * All kits include: Cylinder head cover, insert and rubbers (O-rings)
