Trouble with motor

[Tigerfill]

Hi all,

I'm having trouble with my lrp 5.5 it seams fairly stiff to turn the shaft by the fingers a lot stiffer than my Novak motors it feels like a brushed motor and also if i free-rev it with the pinion off i get a nasty vibration and noise i have stripped it down and can't find anything wrong, the bearings seam ok

Any idea's, suggestions please help thanks

Phil