Our cylinders are perfect for stock replacement. They all meet or exceed O.E.M. specifications. They are made of aluminum for your Sportster, aluminum with a steel liner for your Evolution and cast iron for your Shovelhead and Panhead.This Part...

Our cylinders are perfect for stock replacement. They all meet or exceed O.E.M. specifications. They are made of aluminum for your Sportster, aluminum with a steel liner for your Evolution and cast iron for your Shovelhead and Panhead.This Part...

OEM-style cast aluminum replacement cylinder head comes complete with cam caps and bolts for an out-of-the-box, ready-to-go installation. The unshrouded combustion chamber is designed to improve airflow, featuring a blended bowl and competition-grade...

Kits include aluminum cylinder with galvanic coating design with forged piston with molybdenum coating.This Part Fits:YearMakeModelSubmodel1997-2004YamahaYZ125Base

OEM-style standard bore kits include a cast aluminum Cylinder Works cylinder, Vertex Piston and gaskets needed to restore horsepower and performance, as a competitive price point, compared to OEM options.

OEM-style cast aluminum replacement cylinder head comes complete with cam caps and bolts for an out-of-the-box, ready-to-go installation. The unshrouded combustion chamber is designed to improve airflow, featuring a blended bowl and competition-grade...

OEM-style standard bore kits include a cast aluminum Cylinder Works cylinder, Vertex Piston and gaskets needed to restore horsepower and performance, as a competitive price point, compared to OEM options.

Kits include aluminum cylinder with galvanic coating design with forged piston with molybdenum coating.This Part Fits:YearMakeModelSubmodel2005-2021YamahaYZ125Base

Kits include aluminum cylinder with galvanic coating design with forged piston with molybdenum coating.This Part Fits:YearMakeModelSubmodel1997-2004YamahaYZ125Base

Kits include aluminum cylinder with galvanic coating design with forged piston with molybdenum coating.This Part Fits:YearMakeModelSubmodel2002-2021KawasakiKX65Base

Kits include aluminum cylinder with galvanic coating design with forged piston with molybdenum coating.This Part Fits:YearMakeModelSubmodel2001-2004YamahaYZ125Base