Vespa Cosa 150 [1988-1997] - racing clutch with Z23 sprocket with helical teeth

POLINI racing clutch with Z23 pinion for Vespa Cosa 150

The POLINI racing clutch with Z23 gear rim and helical-toothed pinion is designed for sport-oriented use. Their reverse function differs from the classic clutch design: the component connected to the crankshaft is not the outer bell, but the inner hub. This creates an independent design for performance-oriented Vespa engines.

Structure and function

• Pressure plate with axial bearing for resilient operation
• Aluminum bell as part of the clutch construction
• Cover of the block with oil collecting channel
• Aluminum discs enlarged by 8 teeth to optimize power transmission
• Adjustable spring force to adapt clutch behavior

The clutch enables the selection of the appropriate primary toothing in order to specifically adjust the gear ratio. This version uses a Z23 pinion with helical teeth. The modular design allows the primary gearing to be changed if necessary by replacing the primary gear. This makes it easier to adapt to different engine characteristics within the intended application.

Vehicle assignment

Suitable for the Vespa Cosa 150, built between 1988 and 1997.

Note on selection

Please compare the version with Z23 and helical gearing with the existing primary gearing. The clutch spring can be adjusted to the desired setting. The design supports precise and smooth gear shifting for controlled gear changes in sporting use.