[Moppie]

an 83 :ylsuper ylsuper

not many left now days, most have either rusted away, or been trashed and crashed by kids.

Altough Iv never worked on a rotory, things like drive belts are all pretty much the same on any car.

Does the belt run over and ilde wheel? if so it might pay to check it.
But by the sound of it a bearing has failed in something somewhere, and is putting undue stress on the belt.

Its either that or your over tightening it? unlikly as you sound like you know what your doing, but make sure theres about an 1/3 of an inch of movement on the belt at its longest point.

Otherwise I would double check all the auxulries it driving for play in the pullys, and for alignment with the crank pully.