Vespa PX E Arcobaleno 150 [1981-1997] - racing clutch with Z23 sprocket with helical teeth

POLINI racing clutch Z23 with helical toothed pinion

The POLINI HT clutch is designed for racing use on the Vespa PX E Arcobaleno 150 built between 1981 and 1997. This version uses a Z23 pinion with helical teeth, allowing the selection of a suitable primary toothing to adjust the gear ratios.

Functional features

The operating principle connects the crankshaft with the inner hub. The design includes a pressure plate on a thrust bearing, an aluminum bell and a block cover with an oil collection channel. The coupling allows the spring force to be adjusted so that it can be tailored to the respective area of ​​application.

• HT clutch for racing use
• Z23 pinion with helical teeth
• Pressure plate on thrust bearing
• Aluminum bell
• Cover of the block with oil collecting channel
• Adjustable clutch spring force

Technical execution

The aluminum discs have teeth that are enlarged by 8 teeth. As a result, the clutch supports efficient power transmission. The system is designed for precise and smooth gear changes. By replacing the primary gear, the HT clutch can be adapted to different gear ratios using other available spare parts.

Vehicle assignment

Suitable for the Vespa PX E Arcobaleno 150, built between 1981 and 1997.

The selected version combines the HT clutch with a helical Z23 pinion and is aimed at applications where adjustable clutch tuning and suitable primary gearing are required.