Includes all top and bottom-end components for a complete engine rebuild 4-stroke kit includes a premium forged piston kit with stock compression ratio and a high-quality cam chain 2-stroke kit includes a Pro-LiteĀ« piston Crankshaft and rod assembly designed and inspected to assure durability Kit includes main bearings, seals, gaskets, an hour meter and bracket. ENG KT WISECO KX250 02-03