MINE DOES THE SAME - NEEDS A GOOD SQUIRT OF WD40 ON THE IDLER/TENSIONER PULLEYS EVERY FEW MONTHS. I'VE FOUND I CAN DO THIS BY JUST REMOVING THE VENT CONNECTION, FEELING FOR THE PULLEYS AND SQURTING IN THE GENERAL AREA OF BOTH- TAKES ABOUT 5 MINUTES. GOOD LUCK
MIKEY, April 2008