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Built-in rugged tread blocks feature Staggered Step design
Allows clutch assembly to spin truer creating less heat when clutch is disengaged and providing a more positive smooth clutch engagement
insuring maximum strength
greater resistance to stretching under load and overall improved performance that meets the demands of current large displacement street bikes and the people who ride them
RACING VALVE SPRING KIT 68-37660E Built-in rugged tread blocks featureKPMI valve springs are wound from Premium Kobe Super Clean Chrome Silicon Wire. KPMI valve springs are heat treated, stress relieved, and shot peened to insure maximum performance and life. Springs are engineered for each specific application using proprietary advanced spring design simulation, and analysis software. Engineers pay special attention to cam and spring harmonics, stress, mass, and operating rpm. 80 Lbs of Seat Pressure 205 Lbs @ 0. 435"
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