Hi, I have the same machine and the belt was in tiny rotten pieces...I wound a piece of yarn around the wheel and drive shaft (lie the machine on a kitchen counter, lid open and hanging down off of the counter, bottoms up, and remove the screws from the teardrop shaped brass colored safety cover, remove the cover and expose the wheel and drive shaft) pull the yarn tight and knot it. Then cut the yarn about an inch from the knot. Measure the yarn when pulled on a little. Mine measured 23.5"....I then googled bread machine belt 23.5" and up came one for an Oster Bread Machine (The one I was repairing was a Regal Kitchen Pro 6725) from totalvac.com located at 2 De Bush Ave Unit A8 Middleton, MA 01949
It was $7.95 for the belt, $6.95 S & H to a VA address, total cost $14.90 so I decided to give it a shot. When it got here, I removed the safety cover, held the machine up and shook as much of the old rotten rubber belt pieces out as I could, and replaced the belt by placing it over the sticky string on the drive shaft and teasing it over the wheel. It is an exact fit. Be sure the ribbed side of the belt is down against the wheel. Screw the cover back on and run it through a dough cycle so that the belt will get coated with the sticky stuff from the sticky string on the drive shaft. Until the belt is coated, it will turn the mixing blade, but it will slip. Hope this helps. Patti

Patti Wilson
September 2009