See more: Crankshaft Parts
Big Twin Note: Late 1981 thru early 1983 models require the late 3/4"-20 nut ZPN235833 (OEM 24016-80)., Fits 1958 thru 1972 models (OEM 24006-58)
Jims Machining makes these high quality pinion shafts from high quality aircraft alloy steel. According to Jims they are the finest on the market and are used by the worlds most famous engine builders. Highly recommended for High Performance engines.