CD,
The machine I'm looking at has the motor bracket like the black one in your second pic, but a different motor.
I didn't see the adjustment slots until I lightened up and resized the pic.
The pictures are not clear enough and the seller doesn't say which BU it is.
Cari,
Me too. I hate the cogged automotive and sewing machine belts. Like all things "New and Improved" they usually don't work like the originals.
I always try to get the regular black V-Belts for the sewing machines, and solid belts for my vehicles.
Joe