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...

High-quality cast Big Bore Cylinders from Twin Power™. Factory style black textured powdercoat finish with highlighted fins. Cast in iron liners for strength and durability and finish honed and ready...

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...

Kits include aluminum cylinder with galvanic coating design with forged piston with molybdenum coating.This Part Fits: Year Make Model Submodel 2005-2021 Yamaha YZ125 Base

Kits include aluminum cylinder with galvanic coating design with forged piston with molybdenum coating.This Part Fits: Year Make Model Submodel 1997-2004 Yamaha YZ125 Base

Kits include aluminum cylinder with galvanic coating design with forged piston with molybdenum coating.This Part Fits: Year Make Model Submodel 2002-2021 Kawasaki KX65 Base

Kits include aluminum cylinder with galvanic coating design with forged piston with molybdenum coating.This Part Fits: Year Make Model Submodel 2001-2004 Yamaha YZ125 Base

Kits include aluminum cylinder with galvanic coating design with forged piston with molybdenum coating.This Part Fits: Year Make Model Submodel 1997-2004 Yamaha YZ125 Base