Description:

Replace the original plastic piston that will eventually melt with this aluminum one.. This exhaust valve piston fits for 787cc 2-stroke motors, rfi800 and 951cc carb models.. It use 8 mm x 1.0 internal threads to attach to the valve stem, fits M8X1.25mm thread size.. Replaces the seadoo/skidoo oem part numbers: 290253257, 290854445, 290854446, 290854447, 420253257, 420253258, 420854447, 420854448, 420854449..