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Polini Clutch Spring Kit for Yamaha Zuma 50, Vino 50, and any other Minarelli engine with a 105mm 2-shoe clutch. Includes 3 sets of different stiffness springs for tuning. Increase in spring rates is as follows:
Raw Spring: +20% (5500 RPM)
Yellow Spring: +35% (6000 RPM)
Blue Spring: +50% (6500 RPM)
Made in Italy!