Vespa Rally 200 [1977-1979] - 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 and combines reverse functionality with a design designed for sporting applications. The component connected to the crankshaft sits as an inner hub inside the outer bell. The version with Z23 and helical teeth allows the selection of a suitable primary gear to adjust the gear ratio.

Function and construction

• Pressure plate on thrust bearing for precise actuation
• Aluminum bell as part of the clutch construction
• Cover of the block with oil collecting channel
• Adjustable spring force to adapt the clutch characteristics
• Helical sprocket with 23 teeth

The aluminum discs, which have been enlarged by 8 teeth, are designed for efficient power transmission. By replacing the primary gear, the clutch can be adapted to different gear ratios using other available spare parts. The design also supports precise and smooth gear shifting.

Vehicle assignment

The clutch is assigned to the Vespa Rally 200, built between 1977 and 1979. The version with 23 teeth and helical teeth must be taken into account when selecting the appropriate primary gear.

Technical features

• Product: HT clutch for racing use
• Gearing: helical gearing
• Pinion: Z23
• Manufacturer: POLINI