Vertex Pistons 05-21 YZ 125/20-22 YZ 125 X Complete Engine Rebuild Kit - WR101-081

The only complete engine rebuild kit available. Kit includes Hot Rods heavy-duty crankshaft, Hot Rods counter balancer bearing kit (where applicable), Hot Rods main bearing and shaft seal kit, transmission bearing kit, and water pump rebuild kit, Vertex replica piston kit, Vertex complete gasket and oil seal kit, Hot Rods wrist pin bearing, or Hot Cams cam chain (where applicable)