Polini Secondary Gear Set / Gearing - Sprint / Primavera Euro5 - ratio 14/43 - 202.1424

Once you've upgraded the engine's power with a fast ECU and an 80cc fun cylinder, you can significantly increase top speed by adjusting the secondary gear ratio.

With this gearing you change that ratio to 14/43.

In addition to the fast ECU, cylinder, and secondary transmission, we also recommend the following components for maximum performance:

• Polini High Speed ​​​​Variator
• Polini Racing Exhaust