Rocker Locker Rocker Locking Kit For Harley Big Twin Evo Rocker Locker brings you an innovative product that allows you to get rid of the annoying driveline ticking! Stock rocker arm shafts have a notch that the bolt is supposed to sit against, locking the rocker arm shafts into place. The problem is that the bolt hole is too big and leaves a gap causing the bolt to hit, resulting in that annoying tick. These lockers eliminate the gap, locking the shaft from turning and striking the bolt, thereby eliminating the tick! Features: Lockers are tapered Step by step instructions included Locks the rocker arm shafts