70cc 2-Stroke Big Bore Kit for Chinese Scooters. This kit features a 47mm cylinder bore, 10mm wrist pin, and pin bearing. Designed for 50cc 2-Stroke 40QMB, E40QMB, 1E40QMB, and 1PE40QMB Minarelli engines to increase drive power. Please compare your existing parts with the provided photos before purchase. Type: Big Bore Rebuild Kit Condition: New Wrist Pin Length: 36.8mm Wrist Pin Diameter: 10mm Piston Diameter: 47mm Displacement: 70cc Fitment: Fits most Chinese scooters with Jog, Minarelli, or clone motors Compatible with Jonway, JMStar, Roketa, Sunl, and many others Note: Gasket color may vary; specifications are not subject to change. Color: Silver Gray Material: Metal Package Contents: 1 x Cylinder 1 x Piston Ring Kit 1 x Wrist Pin 2 x Circlips 1 x Piston 2 x Paper Gaskets 1 x Connecting Rod Bearing Content limited to items listed above; other products not included. Note: Lighting and display differences may cause slight variations in color. Measurement error allowed is +/- 1-3cm.