fits  29-73 45″ (750cc) Flatheads (NU)

Sprocket shaft has keyway, use 23985-12 key (MCS 517945). Use 7974 nut (MCS 981184) on flywheel side. JIMS shafts are precision machined in Camarillo, California from a special order steel. Each and every part is thoroughly inspected and after heat treating all threads go through a special process to make them withstand greater torque stress. All shafts are ground to a 16 micron finish or better, unless specified otherwise. All ground diameters are concentric to well within .0003″, making truing and rebuilding quicker and with less effort.

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Home > Parts > Engine > Lower End > Sprocket Shafts > JIMS, sprocket shaft. 45″ Flathead