Airsal 43.5mm cylinder kit for Derbi Flat Reed engines.
Modern Metrakit without the Metrakit name or price tag.
Really solid kit that makes great power without draining a gas tank too quickly. You can totally use these with the stock head.
Aluminum with nikasil plating. 2 ring piston. Auxiliary exhaust ports.
Comes with cylinder, piston, rings, pin/clips, and gasket set.