Vespa PX200 P200E Rally 200 Full Circle Racing Crankshaft Reed Valve 60mm Stroke 110mm Conrod

reed valve
stroke 60,0mm
conrod 110,0mm
Standard - con rod
Connecting rod bearing: 16x20x20 mm
pin 16mm
fine balanced

Full circle crankshafts were originally intended for use in reed valve engines. Their ideal field of operation though is with motors where the carburetor is mounted directly onto the cylinder itself. The extensive development of crankshafts on the German/Austrian racing scenes recently has enabled the 40 PS milestone to be reached and even exceeded without the use of nitrous oxide. The differing crank design concepts all start with the full circle crankshaft (from MAZZUCHELLI) as its basis.

The basic idea behind the full circle crankshaft is to enable an increase in the compression of the fuel mixture before it reaches the combustion area above the piston (HPC). With crankcase reed valve motors it cannot be helped that the full circle crankshaft crank webs interrupt the gas flow within the crankcase rather abruptly. The use of a cylinder where the carburettor is directly mounted onto it, such as the QUATTRINI 177cc1XL, release the true potential of a HPC crankshaft design. This combination allows higher engine revs and extra power.

The MAZZUCHELLI crankshafts are produced using tough and wear resistant materials, have minimal machining tolerances and very low bearing play. High revolutions and a long life are therefore guaranteed. If your needs are not satisfied with this crankshaft you may want to take the LPC route (flowed or bell shaped crankwebs)

MAZZUCHELLI has been delivering premium quality Vespa crankshafts with excellent value-for-money, for decades. They are 100% identical to the originals in appearance, production quality and port timings.

Vespa Crankshafts