Special roller bearings at the pivots of the advance weights give the proper amount of ignition advance at the right time every time. This quality kit includes the roller bearings installed on a quality advance unit shaft and plate, circuit breaker base plate, cam points, wiring harness, springs and timing screw. Fits 1970 thru 1978 Big Twins and 1971 thru 1978 Sportster models, as well as all later models when converting to point-style ignitions.
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