[Hectic]

Yeah I'd say it's a combo of the motor and perhaps a lil tight on shining also have you corrected aoe? You will want to do that for sure, stick on a sorbo pad and shave the second (first smaller tooth at the rear of the piston) and perhaps some of the third so the sector will pick up the piston first tooth to first tooth without any problems like catching up on the other teeth along the way. Bearing are more forgiving on tight shimming, are you using the standard shims or the smaller diameter ones, if the shims are the wide ones and the bearings are say 6mm you may be just running on the shell rather than the bearing depending on how deep the bearings are seated into the shell.