905284 Replacement XL 900cc cast piston. +.030"

When it is time to bore out your early Sportster cylinders, this +.030" oversize cast piston is a great replacement option. It is designed to fit 1957 to 1971 XL900 models and maintains the original 9:1 compression ratio for reliable street performance. The piston comes with the necessary wristpin and clips to get the job done, though rings are sold separately. It is important that a knowledgeable mechanic handles the installation to ensure all tolerances are correct for your specific engine build. Following standard break-in procedures will help ensure these components seat properly for years of riding. This unit replaces OEM 905284 and is built for a perfect stock-style fit.