Hot Rods – Crankshafts & Engine Rebuild Kits, including crankshafts and bottom end kits for the Polaris RZR 4 900 XP, RZR Turbo Pro XP 925cc, RZR 4 800, Ranger XP 1000 Crew and Ranger 900 Crew, plus Can-Am Commander 800 and 800R crank assemblies, General 1000 main bearing and seal kits, and Ranger 900 water pump rebuild kits. UTV engines carry passengers, cargo and a clutch that never really unloads, so crank journals, rod bearings and main bearings see far more sustained heat and torque than a comparable bike engine. A twisted crank or a rod bearing with play shows up as vibration at cruise, low oil pressure and metal in the filter. These UTV crankshaft assemblies and rebuild kits use forged steel, ground and polished journals and hardened pins, with the bearings, seals and gaskets grouped so a side-by-side bottom end goes back together correctly. The result is a machine that pulls hard on long climbs and keeps coolant moving instead of cooking itself on a slow trail. Rebuilding the bottom end right beats chasing symptoms all season. Give us your year, model and displacement and we will confirm the right kit before you order.