The oversized impeller is a component designed to increase the cooling capacity of the system.

This modification allows the bike to be thermally under less stress during hot periods without compromising anything during cold periods, since the thermostatic valve is able to compensate for the increase in cooling (simply by remaining more closed).

To increase the flow rate at the same engine speed, a simple increase in the surface area of the impeller blades is used, obtained thanks to the insertion of a special spacer placed between the engine base and the water pump covers.

Compatible with the following Aprilai models:

TUAREG 660 (660cc) - 2021/2024

RS 660 (660cc) - 2020/2023

TUONO 660 /FACTORY (660cc) - 2021/2023