50mm big bore Piston & Ring Set for Scooter Moped ATV QUAD 139QMB 1P39QMB 147QMD GY6 50 60 80 cc upgrade to 100cc

50mm big bore Piston & Ring Set for Scooter Moped ATV QUAD 139QMB 1P39QMB 147QMD GY6 50 60 80 cc upgrade to 100cc

139QMB 50mm big bore piston & ring set

Piston Diameter (bottom side): 50mm Piston Diameter (top side): 49.45mm Piston overall height: 34.5mm Pin Diameter: 13mm Pin Length: 38.35mm

This item is used for 4 stroke Scooter/ATV 139QMB GY6-50/60/80 cc (39mm/44mm/47mm) upgraded to be 50mm 100cc.