Vespa Sprint Veloce 150 [1977-1979] - racing clutch with Z22 sprocket with helical teeth

POLINI racing clutch with Z22 pinion, helical teeth

The POLINI HT Clutch For Race combines reverse functionality with a design designed for power transmission. In this design, the unit connected to the crankshaft is not the outer bell, but the inner hub. The version with Z22 pinion and helical teeth supports targeted adjustment of the primary gear ratio.

Function and construction

• Pressure plate on thrust bearing for precise clutch actuation
• Aluminum bell as part of the clutch construction
• Block cover with oil collecting groove
• Reinforced aluminum discs with 8 teeth for power transmission
• Adjustable spring force to adapt the clutch characteristics

Technical execution

In this variant, the primary gear has 22 teeth and has helical teeth. The clutch thus enables the selection of suitable gearing if the translation needs to be adjusted. Additional primary gears are also available as spare parts for the POLINI HT clutch, so that the design can be modified by replacing the primary gear. The construction is designed for precise and smooth switching operations.

Vehicle assignment

Suitable for the Vespa Sprint Veloce 150, built between 1977 and 1979.

Factual note

The helical Z22 design is the appropriate choice when a primary gear with 22 teeth and helical teeth is required. The spring force can be adjusted to the desired clutch setting.