PROX Clutch Spring Kit Yamaha FACTORY LINKS bearings are packed FACTORY LINKS bearings are packed with a heavy duty premium marine grease and an addition of a special complex thickeners which allows it to be virtually waterproof Adjustable Slider Vents on Upper Shell and Chin Bar 10% stiffer than the OEM spring and will reduce clutch slippage under extreme conditions for maximum control and instant drive The premium clutch springs give you a high performance feel and durability