*All Kawasaki KX250 cylinders cores have to be sent into us at MCB first (meaning we receive your old core first) prior to shipping your kit. Please place your order first and we will email you shipping instructions.* Your core cannot be iron sleeved or ported! We can plate or bore your cylinder if yours is iron sleeved or ported, but we will not exchange a stock cylinder for an iron sleeved or ported cylinder. MCB Stage-1 Top-End Rebuild Kit with cylinder for 1998-07 Kawasaki KX250 . This engine rebuild kit includes: - Wossner Premium Forged Piston or Optional Cast Pro-x Piston - Genuine Riken rings - Circlips - Top end gasket set - Wrist pin bearing - Genuine Kawasaki cylinder that matches your exact casting number You will need to select your "casting number" and that can be found on the side of your cylinder. Examples are: 0014 0027 0054 1722 1835 1851 1911 1938 1959 1979 Other models may be available or can be re-plated by request.