The Quattrini crankshaft with 60mm stroke and 128mm connecting rod length is a must.
Compared to the M232, the M244 requires the crankshaft housing on the alternator side for the long-stroke shaft to be spindled out.
Due to the crankpin offset, Max Quattrini has provided the 60mm crankshaft with a larger overlap and therefore a larger outside diameter (on the left side).
It is designed for use with the original carburetor and touring exhaust and still achieves over 20hp and 24Nm at the rear wheel. An original PX200 GS with 12hp/9kW registered in the papers rarely exceeds 10hp and 15NM at the rear wheel.
60% more torque and 100% more power, in connection with a very touring-suited power delivery surely fulfills more than only the dream of every Vespa driver.
The M244 uses several technical tricks for this purpose:
The missing foot allows a much larger piston than usual to be used. The extra long connecting rod allows the overflow inlets into the cylinder to be placed further upwards than usual. This, in combination with the special piston, which has strongly bevelled surfaces on the underside of the overflow inlets, allows a very large overflow area without the need to machine the engine housing. The long connecting rod with a proud 126mm connecting rod also improves the connecting rod ratio from Lambda 0.26 to Lambda 0.22, which is important for the smooth running of an engine.
NOTE: Crankcase has to be spindled out for the 60mm stroke crankshaft!
Conclusion: Traveling or racing is no longer a question here, but an option
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