special crankshaft replacement in long race for maxi kit on DERBI euro 1 & 2

Here you will find a long crankshafts spare racing maxi kits mécaboite engine DERBI euro 1 & 2 euro As a reminder, a long race crankshafts increase engine displacement. They offer a clear increase in power and torque! They can be mounted on cylinders specially designed for a long run, but also on kits 70cc or 80cc standard, with a wedge and changing ... housings.