The belt spins true. Had this problem since from beginning, I am more inclined to think the motor was not balanced properly at the factory, like hookon210s said. Also, like francotirador said...I been too patient, I should have look into this 10-15 years ago.

I am pretty confident this extra support bracket will help. Even if not, replacing a $35 bracket is lot cheaper than the $1K vibration damper every few years.

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85' 190E w/collector plates