70cc high engine kit Ø47.6mm METRAKIT SP 70 aluminum for DERBI Variant Start, Start 5

Warning, top end of engine reserved for competition on circuit, closed road.

Finally available from us, here is the METRAKIT top-end kit for DERBI VARIANT START, START 5... With some modifications, it can also be fitted to BYE BIKE or PEUGEOT 103 mopeds! Featuring a booster exhaust, 6 intake ports, a single piston ring, and a high-compression cylinder head mounted on an O-ring, this is clearly a racing top-end kit! Very similar to the BRK, it's an excellent base for engine tuning! Pair it with a good exhaust, a minimum 19mm carburetor, and an exhaust system that can handle high RPMs...

As an option, we offer a Stage 1 preparation. This preparation involves modifying the exhaust port by increasing the port timing and improving the flow, thus increasing cylinder performance. Skirt modifications are also included in this service. Please allow a little extra time for this preparation.

These engines can also be fitted to BYE BYKE or PEUGEOT 103 with an adaptation!