Vespa PX E Arcobaleno 125 [1981-1997] - racing clutch with Z22 sprocket with helical teeth

POLINI HT racing clutch with Z22 pinion for Vespa PX E Arcobaleno 125

The POLINI HT clutch combines reverse functionality with a design designed for the Vespa PX. Unlike a conventional design, it is not the outer bell but the inner hub that is connected to the crankshaft. The Z22 pinion has helical teeth and allows the selection of a suitable primary toothing to adjust the translation.

Function and construction

• Pressure plate on thrust bearing for precise actuation
• Aluminum bell as part of the HT clutch
• Lid with oil collection groove on the block
• Aluminum discs with 8 reinforced teeth for efficient power transmission
• Adjustable clutch spring force

The adjustable spring force allows the clutch characteristics to be adjusted. The exchangeable primary toothing allows the translation to be changed in a targeted manner. The design supports precise and smooth shifting for controlled gear changes.

Technical data

• Manufacturer: POLINI
• Version: HT racing clutch
• Pinion: Z22
• Gearing: helical gearing
• Product area: engine, clutch

Vehicle assignment

The clutch is assigned to the Vespa PX E Arcobaleno 125 in the full year range from 1981 to 1997.

Factual note

The HT clutch is designed for use with selectable primary gearing. The Z22 pinion has helical teeth and is used to adapt the translation within the intended clutch design.