RBS carries a complete supply of parts for the Pioneer front mag drive and from time to time when parts get sold little pieces like this get lost or you may decide during a motor freshen that you may want to put a new thrust bearing and shim kit in the motor.
This kit gives the racer a sealed ball bearing, a bronze thrust shim and three heat treated steel thrust shims that are .005", .010" and .020" thick with a .690" I.D. Works with mag drive #2500-0010 or #2500-0023 mag drive spud.
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