## Complete 150cc Cylinder Kit 57.40mm Bore, 15mm Pin, EURO 4 Upgrade your maxiscooter's engine performance with this high-quality 150cc complete cylinder kit. Engineered as a performance tuning cylinder, it is specifically designed for maxiscooters equipped with 152QMI and 157QMJ (GY6 125-150) 4-stroke engines. This robust upgrade delivers a significant boost in power and reliability, featuring a 57.40mm bore and a 15mm piston pin. The design accounts for EURO 4 standards, ensuring a powerful and compliant enhancement for your scooter. ## Unleash Enhanced Performance This 150cc tuning cylinder is meticulously engineered to elevate your scooter's capabilities to new levels. Riders will experience noticeably improved acceleration, enhanced torque, and an overall more dynamic and responsive riding experience. It stands as an ideal performance upgrade for enthusiasts looking to maximize their maxiscooter's potential, providing a substantial power increase over standard configurations. ## Premium Construction & Durability Crafted from durable cast iron, this 150cc cylinder offers superior wear resistance and exceptional longevity compared to typical aluminum alternatives. Cast iron cylinders are renowned for their inherent robustness and ability to withstand demanding operating conditions, ensuring sustained peak performance over extended periods. A significant advantage of cast iron construction is the possibility of reboring in the event of wear or seizure, which can significantly extend the overall lifespan of this critical engine component. ## Key Product Features & Specifications * **Cylinder Capacity:** 150cc * **Bore Diameter:** 57.40mm * **Piston Pin Diameter:** 15mm * **Total Cylinder Height:** 89.5mm (Overall height of the cylinder, including the sleeve where the piston operates) * **Cylinder Height without Sleeve:** 69mm (Height of the cylinder without the sleeve entering the engine crankcase) * **Outer Sleeve Diameter:** 61.7mm (Outer diameter of the sleeve that inserts into the engine crankcase) * **Material:** Durable Cast Iron (Offers superior durability and allows for reboring) ## Important Installation Note Before proceeding with installation, it is absolutely critical to verify the outer diameter of the cylinder sleeve. For this specific 150cc cylinder, the outer sleeve diameter measures 61.7mm. Ensuring precise compatibility with your engine's crankcase bore is essential for proper fitment, optimal performance, and preventing potential issues. ## Compatibility This high-performance 150cc cylinder kit is precisely engineered for a wide range of maxiscooters that utilize the popular 4-stroke 152QMI and 157QMJ engine platforms. These engines are commonly known as GY6 125-150 engines, and this cylinder provides a direct and effective tuning solution for vehicles originally equipped with these robust power units.