S&S Pinion Gears

13 products — part of all Pinion Gears

S&S pinion gears give Harley-Davidson engine builders precision-machined replacements and upgrades for the critical gear set that drives the camshaft and oil pump from the crankshaft, forming the heart of the Big Twin engine gear train. The pinion gear is under constant load whenever the engine is running — it meshes with the cam gear at a fixed ratio and transmits that drive through to the oil pump gear, meaning that wear in the pinion affects the timing accuracy of the camshaft and the reliability of oil pump drive simultaneously. S&S machine their pinion gears to precise tooth profile and hardness specifications, with options covering both stock-specification replacement for worn originals and improved-clearance versions suited to high-output Harley-Davidson engines where the gear train runs at elevated temperatures. Using a quality S&S pinion gear during an engine rebuild ensures this foundational component matches the quality of the other S&S components in the assembly. Iron City Motorcycles, an authorised Harley-Davidson dealer in Leeds, carries S&S pinion gears alongside a full engine rebuild and performance components range. Browse the full S&S Pinion Gears range below.