910-0436 S&S Cycle Silver 1250cc Conversion Kit

Description

• S&S Cycle largest big bore kit for Sportster models that bolt to stock crankcases

• Can typically increase horsepower to over 90hp with proper exhaust, camshafts, CNC ported heads, while using the stock fueling system

• Forged pistons are dome top 11.2:1 compression ratio (based on 60cc combustion chambers)

• Each piston is fitted with rings and wristpins, and have larger then stock valve pockets that accept up to 2.00″ valves

• Cylinders are 3-9/16″, available in silver or wrinkle black finish and come with MLS head, base, and exhaust gaskets