Bonneville America Forums Forums Technical Forums Custom Corner Turn Signal Cut Down - Nice

I would agree with Warlock. I recall the original thread to be M10 x 1.25. I was checking back on emails from my stepfather and I recall he did end up tapping the bulb housing to a slightly larger bore and made it a standard thread. It may have been he did not have metric tap and die to match the housing thread, I can't remember. I had him cut down the shaft to about 1.25" plus the threaded ends. I have a BackOff plate frame and measured from the plate mount housing to the edge of the frame plus 0.25".