NARAKU 2V Piston & Rings Kit 50cc (39mm Bore) for Scooters QMB139 Motors

NARAKU REPLACEMENT PISTON KIT FOR QMB139 4-STROKE 39mm BIG BORE CYLINDER KIT KIT INCLUDES PISTON, RINGS, PISTON PIN AND CIR CLIPS. PISTON DIAMETER: 39mm WRIST PIN DIAMETER: 13mm TOTAL PISTON HEIGHT: 33.5mm NARAKU PERFORMANCE QUALITY PISTON SET. SUITABLE FOR ALL GY6 50CC CYLINDERS [39MM BORE]. THE NARAKU PISTON HAS A MOLYBDENUM COATING TO REDUCE WEAR AND SHORTEN THE RUNNING-IN PERIOD. THIS PISTON HAS BEEN INCLUDED IN ALL 50CC NARAKU CYLINDER SETS SINCE 2009, AND CAN BE EASILY USED AS A REPLACEMENT IN CHINESE ORIGINAL CYLINDERS. THE CNC-MACHINED GROOVES IN THE PISTON SKIRT ENSURE CONTINUAL LUBRICATION. THE LUBRICATION HOLE WITH SUNKEN OIL GROOVE IN THE SMALL END BEARING IS TECHNOLOGY TAKEN STRAIGHT FROM THE RACE TRACK. ADVANCED PISTON TECHNOLOGY FOR 4-STROKE ENGINES. PISTON KIT COMES COMPLETE WITH RINGS, OIL SCRAPER RINGS, GUDGEON PIN AND CIRCLIPS. FITS MOST CHINESE SCOOTERS WITH 50cc QMB139 MOTORS FITS SOME MODELS OF TAO MOTORS, ICE BEAR, WOLF, JONWAY, JMSTAR, ROKETA, SUNL, TANK, PEACE, TAOTAO, GATOR AND MANY OTHERS SHIPS FROM SHELBY, NC