Carter dry clutch sg racing x engines DERBI euros 3 and 4 that allows you to get from 0.5 and 1 horse of power that on motorization of these cubatures is not little. It is delivered complete with everything, ready to be mounted on your DERBI. The base is designed to reassemble the original water pump, but to get the most out of it we recommend removing and closing the mechanical pump hole, and using an electric water pump. Quick access to the 5 special clutch discs, which can be used with original or racing gearboxes. Reduced amount of oil in the engine between 350 and 400 ml, a screw in the crankcase will give you the right level.