S&S Cycle offers engine kits for your Harley-Davidson® bit twin or Sportster® motorcycles. Increase your horsepower with these engine kits that increase your displacement and don't let sleeping hogs lie.
No need to bore or even split the cases, just do the cylinder and piston swap. In addition to the ease of installation, they look great because the cylinders are available with the same silver or wrinkle black powdercoat as stock, so they match the stock finish of your engine.
1250cc Conversion Kits for 1986-2014 1200cc Harley-Davidson® Sportster® Models