Vespa Vespa 150 [1977-1981] - racing clutch with Z23 sprocket with helical teeth

POLINI racing clutch with Z23 pinion for Vespa 150

The POLINI HT clutch is designed for racing use and combines reverse functionality with variable coordination of the clutch and primary drive. Unlike a traditional design, the part connected to the crankshaft is the inner hub and not the outer bell. This enables the power transmission to be designed to suit the intended purpose.

Function and construction

• Pressure plate on thrust bearing for HT clutch design
• Aluminum bell
• Cover of the block with oil collecting channel
• Aluminum discs enlarged by 8 teeth to maximize transmission efficiency
• Adjustable clutch spring force

The clutch allows the choice of primary gearing to adjust the gear ratio. This version uses a Z23 pinion with helical teeth. The POLINI HT clutch can be adapted to different gear ratios by replacing the primary gear. Suitable spare parts from the POLINI catalog make this modification possible.

Circuit and area of application

The construction supports precise and smooth gear shifting. The coupling is therefore suitable for applications where adjustable spring force and coordinated primary toothing are required.

Vehicle assignment

Suitable for the Vespa Vespa 150, built between 1977 and 1981. The vehicle assignment refers to this complete year range.