Nikasil Big Bore Kit Harley Davidson Sportster 1200 To 1250


1250cc Nikasil Bolt-on big bore kit. Use with XLH 1200 heads. Includes 10.5:1 forged dish conversion pistons, pins, clips, rings, aluminum nickel-silicon carbide plated millennium technologies SILVER cylinders and Cometic head and base gaskets for Harley Davidson 1200cc Evolution Sportster 1986 – 2013. SKU: TE104

Out of stock


1200cc conversion to 1250cc Nikasil big bore kit includes 10.5:1 forged pistons, pins, clips, rings, Silver cylinders and Cometic head and base gaskets. Turn your 1200cc Harley Davidson Sportster into a big bore 1250cc machine. This is an easy way to bolt on an increase in horsepower. Kit uses 10.5:1 compression ratio pistons so you can reuse your stock cylinder heads and still run on pump gas. All parts are machined on CNC machinery for precision. These are high quality parts and require no machining to the cases or other modifications – bolt on and go! We inspect all parts before they are shipped to ensure that they are correct.

  • 1250cc Bolt-on big bore kit
  • For use with XLH 1200 heads. NO CASE BORING required.
  • 10.5:1 forged pistons, pins, clips, rings
  • 3 9⁄16 inch bore millennium technologies Revolution SILVER finish cylinders
  • Cylinder and piston kits come complete with one piece, all aerospace grade aluminum nickel-silicon carbide plated bore cylinders, complete forged piston kit and cometic head and base gaskets
  • This top end set will create more horsepower and engine life due to their cooler running temperature
  • This is the best high performance top end set available
  • Buell models and Harley Davidson evolution Sportster 1986 – 2013

Additional information

Weight 19 lbs
Dimensions 21 × 14 × 10 in