I have had the same problem (twice) as (user name clm) in the forum. Bearing splitting and rubbing on the back plate etc. I use mobil syn.... and have all the rcomended cooling baffles etc.... I have about $700.00 stuck into this thing now. Could you send me or post whatever you sent user name(clm). I love the way the engines runs but I am getting very frustrated. Thank you, Chad Erickson