Crankshaft -MAZZUCCHELLI RACING (rotary valve), Super Competizione, 51mm stroke, 97mm connecting rod- Vespa PK125 XL2, PK125 ETS (Ø 24mm cone)

Mazzucchelli Super Competizione crankshaft for PK125

The Mazzucchelli Super Competizione crankshaft has a very long intake timing angle.
This means that it generates a very large timing cross-section even on an unmachined engine case intake. By reworking the intake window in the engine housing, an intake angle of over 200° can easily be achieved. The shaft has the standard stroke and the standard connecting rod length.

It is therefore very suitable for building a powerful, rotary valve-controlled engine with little effort. The Super Competizione has also been successfully used by us several times in racing.