The relatively low-cost racing crankshaft polini is a rock-solid investment for those who want to rebuild a horizontal Minarelli engine, but still do not know whether more tuning steps are planned. Whether as spare parts or base for a tuning with the choice of the Polini crankshaft is never the wrong one. The best quality crankshaft from Italy comes with polished rods and 10 mm Polini little end bearing. Replace the crankshaft with the Polini part number 210.0006.