IDLER SPROCKET, 520 (G0600.1B7 RevA, IDLER SPROCKET, 520 (G0600.1B7 RevD or IDLER SPROCKET, 520 (G0600.1B7 Rev E.
Which one should I buy. I've seen a picture of 2 of them. One is smooth the other has flat teeth.
Thanks in advance!!