Vespa GTR 125 [1977-1978] - racing clutch with Z23 sprocket with helical teeth

POLINI racing clutch with helical Z23 sprocket for Vespa GTR 125

The POLINI HT clutch is designed for racing use and combines reverse functionality with a design designed for power transmission. The component connected to the crankshaft does not sit as an outer bell, but rather as an inner hub. The helical Z23 design supports the selection of a suitable primary toothing to adjust the gear ratio.

Function and design features

• Pressure plate with thrust bearing for precise actuation
• Aluminum bell as part of the clutch construction
• Covering the block with oil collecting channel
• Adjustable spring force to adjust the clutch
• Aluminum discs enlarged by 8 teeth for efficient transmission

The clutch allows the gear ratio to be adjusted by choosing the primary sprocket. This allows the gearing to be tailored to the respective intended use. The construction is designed for precise and smooth gear shifting.

Vehicle assignment

Suitable for the Vespa GTR 125 built between 1977 and 1978.

Factual note

The version has a helical Z23 pinion. The system is designed for racing use and offers adjustable spring force and the ability to select the primary sprocket to adjust gear ratios.