Originally Posted by
downtube42
I've got the same problem on my Super Sport. I suppose I'll try some loctite, but more than likely I'm looking at a new spindle and crankarms.
it doesn't take much... if the crank loosened off once then it was probably a rounded taper that caused it to loosen. Simply re-tightening and riding might get you home in a pinch but you've got to address the problem, not the symptom.