Mazzucchelli racing crankshaft for Vespa PV125, ET3, PK125
To achieve higher engine speeds, you should use a racing crankshaft. The extended intake timing allows the engine to rev much more freely. This measure is particularly noticeable with high-speed cylinders.
The quality of the crankshafts is very good and they can withstand even the highest speeds. They are an ideal addition, especially for larger displacement engines from 125cc upwards, to extend the usable rev range of racing cylinders without causing spitback in the lower rev range.
These engines offer both a decent torque over the entire rev range and free revving without the engine running out of air on inclines.
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