
The most technologically advanced heads on the market. Mike Roland's designs carefully balance the production of awesome horsepower and torque with the important qualities of a good street motor - Starts as easy as a stock bike, runs on pump gas without any detonation, turns cooler than stock, and is as tractable as a stock bike.
Features:
Efficient bathtub combustion chambersSet up to .640" lift camProprietary valves designed on the flow bench to match Wild things partsHard valves seats for use with lead-free fuelIntake Ports - 3/8" raised high flow and high velocity with 1.980" stainless intake valvesExhaust Ports - Constant radius "D" high flow and high velociy with 1.630" stainless exhaust valvesUtilizes equal length head bolts to miniminze cylinder distortion and promote consistent head gasket squish. Requires purchase of four long OEM headbolts, sold seperately. (H-D P/N 16478-85A)Extra cooling fin areaLarger and improved breather passages, requires crankcase breather kit with 1/2" - breather boltsLarger and relocated oil drainsAll stock parts will mount to head