Scooterworks Big Bore Kit (63mm, 180cc); GY6 150

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:nIncludes cylinder, piston, pin, circlips, rings, head gasket and base gasketnUpgrades to 180ccnBore: 63mmnOverall Height: 90.5mmnCylinder Sleeve Outer Diameter: 64.9mmnCompatibility:157QMJ-based 125cc / 150cc / 169cc engines with the following engine codes:nn157QMJn161QMKn152QMIn1P61QMKnnnYN1P57QMJn1P52FMIn154FMInJJ157QMJnnn1P57QMJnBN157QMJnBN161QMK-AnOther QMJ, QMK, and QMI modelsnnDon’t see your engine listed? If the engine code includes “QM” or “FM”, this product is compatible with your vehicle.About Scooterworks: Since our beginning in 1989, Scooterworks has become a major supplier of parts and accessories for vintage and modern scooters. We have everything you need, from wear-and-tear items like tires and oil filters to after-market parts from brands like Malossi, NCY, Prima, YSS, Dr. Pulley, and more.nnNOTE: 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:nIncludes cylinder, piston, pin, circlips, rings, head gasket and base gasketnUpgrades to 180ccnBore: 63mmnOverall Height: 90.5mmnCylinder Sleeve Outer Diameter: 64.9mmnCompatibility:157QMJ-based 125cc / 150cc / 169cc engines with the following engine codes:nn157QMJn161QMKn152QMIn1P61QMKnnnYN1P57QMJn1P52FMIn154FMInJJ157QMJnnn1P57QMJnBN157QMJnBN161QMK-AnOther QMJ, QMK, and QMI modelsnnDon’t see your engine listed? If the engine code includes “QM” or “FM”, this product is compatible with your vehicle.About Scooterworks: Since our beginning in 1989, Scooterworks has become a major supplier of parts and accessories for vintage and modern scooters. We have everything you need, from wear-and-tear items like tires and oil filters to after-market parts from brands like Malossi, NCY, Prima, YSS, Dr. Pulley, and more.