180cc 61mm Big Bore Cylinder Kit For GY6 125cc 150cc 1P52QMI 1P57QMJ Engine ATV

Note: Great upgrade for your scooter. go from 150cc to 180cc with this 61mm Kit. No boring required for most scooters' 157QMJ engines. Now if you have a P series engine (1P57QMJ). This 61mm kit upgrades your old GY6 125cc/150cc 1P52QMI/1P57QMJ engine to 180cc.

eBay