Doppler Racing Crankshaft Minarelli AM6, HQ full-circle crankshaft, suitable for up to 18,000rpm. It comes with a reinforced 12x17x15mm small end bearing. Excellent value for money racing crankshaft, recommended for use with racing configurations.

Note: the journals have a 20mm diameter meaning that you'll have to use 20mm main bearings with this crankshaft, such as the ones for Derbi, see S6-80310C3/FAG