Engine Kit Ktm Wr101-159 Wr101-159Complete Engine Rebuild Kit for 2 StrokeConvenient one stop shop in a box; nearly all components required for a complete and professional rebuild Vertex piston kit (standard compression piston, rings, pin and clips) Hot Rods heavy duty crank (stock stroke with wrist pin bearing) Hot Rods main bearing seal kit Hot Rods transmission bearing kit (includes transmission bearings, output shaft collar and sprocket lock washer) Hot Rods counter balancer