Pulley / Fanwheel Polini Air Speed Evo Piaggio 12,5°

front Pulley Polini Evolution P.R.E. 12.5° Piaggio For Polini P.R.E. / Evolution engines we can offer you an oversize pulley with 12.5° pitch and fixed fan blades. The pulley was specially developed for performance-enhanced Polini P.R.E. setups, but can also be used in other tuning transmissions. Advantages of Polini Air Speed With an increased diameter of 115 mm and manufactured from anodized aluminum alloy, it stands out thanks to its aerodynamically shaped, backward-curved cooling fins. This special design increases the airflow within the CVT/transmission area by up to 30% – especially at high engine speeds between 13,000 and 15,000 rpm. In addition, the power absorbed by the crankshaft is reduced by 5%. As a result, engine performance remains consistently at the highest level while ensuring maximum efficiency. Also available as a fan wheel with 14° pitch. Specifications Polini Air Speed fan wheel CNC aluminum fan wheel Diameter: 115mm Pitch: 12.5° For Piaggio 50cc