Airsal 50cc kit for Derbi flat reed engines. This one has no gaskets! Not really a big deal. Reuse your old head gasket and cut a base gasket no problemo with a razor. Otherwise, this kit comes with wrist pin, clips, exhaust studs, piston, and ring. This is a single ring kit that should rev out nicely. Now's your chance give your Derbi an inexpensive upgrade while maintaining the prestige of 50cc.