High Quality Racing full circle crankshaft from Top Racing. The specialist Portuguese crankshaft manufacturer is a symbol of high quality crankshafts. Increased pre-compression in the cases for more efficient filling rate. Power band shifts to a higher rev range. The torque and performance improve due to the increased inertia of the full metal construction. It should, however, be used with 70cc cylinders. In 50cc cylinders, the performance increase is somewhat lower. The crankshaft is supplied with small end bearing. Made in EuropeSuitable to Derbi engines EBE050 (kick-start) and EBS050 (E-start). Not suitable to Cagiva Mito, Derbi GPR EBS, Gilera GSM, Zulu.