650cc Replacement Cylinder and Piston Kit for Yamaha XS650
Big Fin Cylinder Block fitted to Standard size 650cc. original type pistons. Includes Cylinder Block, fitted Stock type cast pistons, piston pins, clips, Head and base gasket and matching piston ring sets.No core accepted or required.Kit Fits: 1974-84 447 XS/TX 650 Engines.Start over at the original stock 650cc. bore size with the improved cooling and good looks of our Big Fin cylinder.