POLINI Primary Gear Vespa 50/125 ET3

The POLINI primary gear is an essential component for those looking to optimize the performance of their motorcycle. Designed to position the clutch hub 0.5 mm further out compared to the original shaft, this gear allows the use of competition clutches with more discs, thereby improving engine response and power.

To ensure precise mounting and reduce axial play of the shaft, it is recommended to use the spacer Ø10xØ16x0.5, particularly useful in standard engines where play is often high. Although the installation of the primary gear is recommended, it is not essential; however, it is important to check the alignment of the clutch actuator cylinder. If necessary, it is possible to lower the cylinder by a value between 0.5 and 1 mm.

For optimal installation, it is recommended to mount only the gearbox (without the crankshaft) and to carefully check the mounting clearances between the primary shaft and the clutch actuator. This gear represents a strategic choice for those looking to enhance their motorcycle's performance, taking power and responsiveness to a higher level.

• Positioning of the clutch hub 0.5 mm further out
• Allows the use of competition clutches with more discs
• Improves engine response and power
• Recommended spacer Ø10xØ16x0.5 to reduce axial play
• Suitable for standard engines with high axial play
• Installation of the primary gear recommended but not essential
• Verification of the alignment of the clutch actuator cylinder necessary
• Possibility to lower the cylinder between 0.5 and 1 mm
• Optimal installation recommended only with gearbox (without crankshaft)
• Check of mounting clearances between primary shaft and clutch actuator