New reenforced high quality VOCA crankshafts for tuned gearbikes. Elaborated of high quality materials only, completed with black anodized aluminium inserts which lower the weight of the crankshaft and increase the performance of the engine. VOCA crankshafts are made to resist and to enhance the performance of most powerful cylinders. Equiped with CNC machined conecting rod and silver needle bearing. Standard measures, validated up to 16.000 RPM. Available for Derbi Euro2, Derbi Euro 3 and Minarelli AM6 engines.