This is the 24mm Evolution version of the carb developed by Polini. In the induction and air filter areas, the carb has been opened up and the induction area has been increased to 26mm, giving even more power. The funnel included in the delivery allows for a bigger connection diameter of 60mm to cater for the Evolution air filter that is available separately.
When designing this CP carburettor, Polini has paid particular attention to size and weight, creating an especially compact and about 40% lighter carburettor. The compact design makes for a very short intake tract. The venturi has a unique concentric design (in contrast to the conventional oval ones) and therefore a geometry that optimises air flow. A revised emulsion tube and a bigger needle improve the atomising of the fuel mixture. This is expected to offer an easier set-up and high performance coupled with low consumption.
Different from the 19mm version, this one comes with oil and vacuum connections.