Mazzucchelli racing crankshaft 60 mm for Vespa PX125/PX150
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 engines with a larger displacement, in order to extend the usable speed range.
These engines rev freely, which leads to a significant increase in top speed.
The extended stroke is also a very good tool for changing the basic design of an engine. The engine can be trimmed either in the direction of torque or speed using cylinder head and base gaskets of different thicknesses.
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