
POLINI Half-Pulley 14° (manufacturer reference 244.0131) — a specific solution for prepared urban scooters, the Polini Evolution Air Speed self-ventilated half-pulley is designed for Polini Evolution engine casings and tuned Piaggio engines. Made from anodized aluminum alloy with a diameter of 115 mm, it features inverted blades with an aerodynamic profile that optimize airflow within the transmission.
Ideal for urban riders looking to enhance reliability and improve transmission ventilation on prepared setups, this half-pulley naturally fits models such as the Aprilia SR 50 R (2022), the Piaggio Typhoon 50 E4 (2020), or certain Vespa LX 4T (2013). Please check compatibility with your casing before installation.