Wiseco S662 Piston Wrist Pin Fits Wiseco piston part number series: 809M, 837M, 809M, 811M, 812M, 812M Unchromed piston pin (for 2 and 4-cycle use) Outer diameter: 22.000mm x length: 69.85mm x inner diameter: 15.00mm Weight: 99 grams High quality alloy pin is compatible with most OEM pistons