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This high-quality cylinder kit is suitable for all Chinese GY6-150cc/157QMJ air-cooled 4-stroke scooters/ATVs and is made of durable steel alloy material. It is a perfect replacement and repair for the damaged original cylinder, providing better engine performance.

Built under strict quality control standards, the design of this cylinder kit has been improved for more durability. It is professionally manufactured with high precision and good reliability.

The cylinder has an inner diameter of approximately 57.4 mm (2.26 inches), an outer diameter of the skirt of approximately 62.2 mm (2.45 inches), a bolt spacing of approximately 54 mm (2.13 inches), a raised surface to surface of approximately 68.9 mm (2.71 inches), and an overall height of approximately 90 mm (3.54 inches).

The piston kit includes a piston with a diameter of approximately 57.4 mm (2.26 inches), an overall piston height of approximately 38.5 mm (1.52 inches), a piston pin with a diameter of approximately 15 mm (0.59 inches), and a piston pin length of approximately 41.9 mm (1.65 inches).

The package includes 1 x 57.4 mm cylinder kit, 2 x shims, 2 x ring spacers, 2 x plugs, 2 x iron stands, 1 x piston ring, and 1 x piston pin.

100% satisfaction: Our customers are our top priority. If you find any product problems after receiving the item, such as damage and incorrect quantity of goods, please contact the seller immediately. We will do our best to provide you with satisfactory customer service.