SSP-G QMB139 50mm Piston Kit $34.99 Quantity discounts available QuantityPrice SKU: 169-203 Out of Stock Available for BACKORDER Email When Available - Click Here! Get notified when your part is back in stock. First Name Last Name Email Address (required)Suscribe to marketing emails. Email Me! Quantity -+ Add to Cart Details Specs Piston Outer Diameter: 50mm Total Piston Height: 34.8mm Compression Height: 18.5mm Wrist Pin Diameter: 13mm Wrist Pin Length: 38mm Includes pist... Supported Models Various unlisted makes/models DetailsSpecsSupported Models Back SSP-G Piston Kit for the 50cc QMB139 4-stroke 50mm, Racing Big Bore Cylinder Set. Back Piston Outer Diameter: 50mm Total Piston Height: 34.8mmCompression Height: 18.5mmWrist Pin Diameter: 13mmWrist Pin Length: 38mmIncludes piston, pin, rings and circlips Back Various unlisted makes/models