Vespa GTR 125 [1977-1978] - racing clutch with Z22 sprocket straight teeth

POLINI racing clutch with Z22 sprocket for Vespa GTR 125

The POLINI racing clutch with Z22 ring gear and straight-toothed pinion is designed for the Vespa GTR 125 built in 1977-1978. Their design uses a reversed functionality: the area connected to the crankshaft is designed as an inner hub, while the outer bell does not take on this function. This creates an independent design for power transmission.

Function and construction

• Pressure plate on thrust bearing for precise actuation
• Aluminum bell as part of the clutch construction
• Block cover with oil collecting groove
• Aluminum discs reinforced with 8 teeth to transmit the driving force
• Straight toothed Z22 pinion for the selected primary gear ratio

The clutch offers the possibility of adapting the spring force to the respective requirements. In addition, the teeth of the primary gear can be selected to coordinate the translation. This version uses a pinion with 22 teeth and straight teeth.

Technical features

• Brand: POLINI
• Version: Racing clutch with sprocket Z22
• Pinion: 22 teeth, straight teeth
• Pressure plate with thrust bearing
• Aluminum bell and reinforced aluminum discs

Vehicle assignment

Vespa GTR 125, built between 1977 and 1978.

The construction supports precise and smooth shifting. The ability to adjust the spring force and the fixed Z22 toothing make the clutch a specifically tailored solution for the vehicle area mentioned.