1270cc Cylinder and Piston Conversion Kit Silver - V-Twin 11-1273 - Evolution Sportster 1986-2003

Big bore cylinder kit for 1200-1270cc conversion on Sportster models. Kit includes head gasket and has a compression ratio of 10.1.

Increase your horsepower with our V-Twin 1270cc big bore conversion kit. Our kit includes 2 silver finished cylinders pistons and rings. Cylinders are pre-fitted with a forged piston set with moly rings ready to install. No machining necessary. *NOTE: Kit can be used for the conversion of 1200cc models to 1270cc only. The finish bore is 3.5995 inch to 3.6005 inch. MC forged pistons have teflon coated tops to aid in a more complete combustion. Final cylinder is done on our 6 position Rottlier honing machine. *NOTE: Includes flat piston set specifically for 1200cc models.

Fitment: