1250cc Conversion Kit for 1986-21 HD® Sportster® Models - Silver Finish components including Harley-Davidson's Boom Audio system

including Harley-Davidson's Boom Audio system and J&M's Rokker system

all of our front calipers are a direct bolt-on for 1984 and up models except the Springer

Big lift lets your big mill breathe high into the RPM range

Each performance air filter features an inverted pleated top and is handmade from black synthetic filter element wrapped in a stainless steel mesh

and adjustable front to back by up to 2" to accommodate different size riders and comfort zones

1250cc Conversion Kit for 1986-21 HD® Sportster® Models - Silver Finish components including Harley-Davidson's Boom Audio systemThis kit converts 1986 '21 883cc and 1200cc HD Sportster models to 1250cc displacement. No machining or rebalancing is required. Kit contains forged flat topped 3 9 16" bore pistons with coated piston skirts, S&S 3 9 16" bore cylinders, MLS head gaskets, base gaskets, exhaust gaskets, assembly lube, and instructions. 883 cylinder heads may not be used with this kit. For the best performance CNC head porting, performance cams, exhaust and intake