GOOFIT 40mm Piston Assembly Kit for 2 Stroke 50cc Yamaha Jog Moped Scooter Fits for 2 stroke 50cc Yamaha 1994-2015 PW50 Y-Zinger Jog Moped & Scooter Specifications:Piston Diameter: 40mm(1.57"),Piston Hight: 50mm(1.96"),Piston Pin Length: 33mm(1.29"),Piston Pin Outer Diameter: 10mm Package including:piston,3 piston rings, wrist pin,2 clips Arrival within 1-2 days (Sold by GOOFIT and Fulfilled by Amazon); Arrival within 7-15 days (Ships from and sold by GOOFIT) Reminder / Note: To make sure you are buying the right product, please read the product description carefully or image size. Thank you for your attention. If you have any problems or need help, welcome to contact us before or after your purchase. We will do our best to help you to solve it