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<p>Solution:</p> <p>Early 2006 run K-27s had a Motor overlubrication issue, which is exhibited by a puff of smoke leaving motor when running on DC as the oil burns off.  Corrective action is to order a new motor from Soundtraxx.  While I was at it, I had them send me a new wiring harness for it because I happen to know that the magnet wire insulation breaks down and causes shorts, which would present itself later.  Excellent service from Soundtraxx/Blackstone. </p>
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