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

After improving the engine’s power with a High Speed ECU and an 80cc performance cylinder, you can significantly increase the top speed by adjusting the secondary transmission ratio.

With this gear set, you change the ratio to 14/43.

In addition to the High Speed ECU, cylinder, and secondary transmission, we also recommend the following parts for maximum performance:

• Polini High Speed Variator
• Polini Racing Exhaust