MCS Pinion Shafts

10 products — part of all Pinion Shafts

MCS pinion shafts give Harley-Davidson engine builders the precision-ground replacement shafts needed to restore the integrity of the crankshaft assembly when the original shaft shows wear or damage beyond acceptable limits. The pinion shaft carries the pinion gear that drives the cam train and oil pump from the crankshaft — a worn or damaged shaft introduces runout into this critical drive, affecting valve timing, oil pump efficiency and ultimately the longevity of the engine rebuild. MCS produce pinion shafts to the dimensional specifications of Harley-Davidson Big Twin engines, with shaft diameter, journal finish and taper accuracy ground to the tolerances required for correct bearing preload and gear mesh when the crankshaft assembly is trued and pressed. Pinion shaft replacement is a job that is almost always combined with a full crankshaft rebuild rather than carried out in isolation. Iron City Motorcycles, an authorised Harley-Davidson dealer in Leeds, carries MCS pinion shafts alongside a comprehensive engine rebuild and crankshaft components range. Browse the full MCS Pinion Shafts range below.