53-615
29999-97.
Rotor; 45 amp.These rotors have enclosed magnets; no chance that they can come loose. Fits Big Twin 1981 & later. Replaces OEM 29957-81B & 29957- 85A. Rotors will work on all H-D® Big Twin with correctly matched stator and volt pak. Refer to service manual for proper spacing due to different sprocket shaft lengths and compensator stack heights.