Minarelli clutch spring set 15% 30% 50%

We all know that getting the most from your engine means keeping your RPM's within the powerband. When you install a performance pipe you will want to add stiffer springs so your clutch engages when your making power. Set includes 3 sets of springs rated 15%, 30%, and 50% stiffer than the stock springs.   These will fit the Yamaha Zuma Vertical and Horizontal engines along with many of the clones.