Crankshaft Doppler Endurance Derbi Euro 3 / 4

Racing crankshaft Endurance Derbi Euro 3 and Euro 4 Very high quality racing full circle shaft from Doppler, for Derbi engines, at a exceptional value for money. Suitable for many different 50cc motorbikes with Derbi Euro 3 and Derbi Euro 4 engine (D50B0). Full-circle crankshafts increase the pre-compression in the crankcase, which leads to a better filling and increased engine power. Also, the engine runs smoother, with reduced imbalance and less vibration. The counterbalance weights are made of aluminum, the connecting rod is forged, the crankshaft has 18mm crankpin. Comes with reinforced 12x17x15mm piston pin bearing. Suitable for engines up to 18,000 rpm. The crankshaft can be used as a replacement for the original crankshaft or tuned setups with 50cc or 70cc racing cylinders. The Doppler Endurance should be installed with new reinforced bearings; these are not included and must be ordered separately. If the crankshaft does not meet your expectations, check out our wide selection of crankshafts (OEM quality and reinforced). Crankshaft Doppler Endurance Derbi Euro 3 / Euro 4 after 2006 Full circle crankshaft Small end bearing: 12x17x15 mm