Polini Speed Drive mobile half-pulley Code: 244.577 The Polini Speed Drive mobile half-pulley is specially designed for Yamaha T Max and Kymco AK 550. Designed to keep acceleration steady even at high speeds. All this is possible thanks to the adoption of new cams with constant inclination of 37 degrees which allows an increase in the contrast of the belt so as to keep the engine speed constant. Features: - Specific for: Yamaha Tmax 500 Carburatore 2001>2003
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