DESCRIPTION: Scooterworks Big Bore Kit (63mm, 180cc) for 150cc GY6 engines. Upgrades to 180cc based on a stock stroke of 57.8mm!Original Parts For Scooters SKU 164-310NOTE: You may need to modify your engine case to accommodate the larger cylinder; the engine boring tool is available online (SKU 202-37).Specifications: Includes cylinder, piston, pin, circlips, rings, head gasket and base gasket Upgrades to 180cc Bore: 63mm Overall Height: 90.5mm Cylinder Sleeve Outer Diameter: 64.9mm Compatibility:157QMJ-based 125cc / 150cc / 169cc engines with the following engine codes: 157QMJ 161QMK 152QMI 1P61QMK YN1P57QMJ 1P52FMI 154FMI JJ157QMJ 1P57QMJ BN157QMJ BN161QMK-A Other QMJ, QMK, and QMI models Don’t see your engine listed? If the engine code includes QM or FM, this product is compatible with your vehicle.
NOTE: You may need to modify your engine case to accommodate the larger cylinder; the engine boring tool is available online (SKU 202-37).Specifications: Includes cylinder, piston, pin, circlips, rings, head gasket and base gasket Upgrades to 180cc Bore: 63mm Overall Height: 90.5mm Cylinder Sleeve Outer Diameter: 64.9mm Compatibility:157QMJ-based 125cc / 150cc / 169cc engines with the following engine codes: 157QMJ 161QMK 152QMI 1P61QMK YN1P57QMJ 1P52FMI 154FMI JJ157QMJ 1P57QMJ BN157QMJ BN161QMK-A Other QMJ, QMK, and QMI models Don’t see your engine listed? If the engine code includes “QM” or “FM”, this product is compatible with your vehicle.
