are they bearings or bushes > i pulled a few sets out or some yamaha 125 swingers this week and after a few days of failing i fould they came out if i used a T-bar socket from the other side and tapped, then swiched over when it came out and was able to go up to the full width socket on the other side.
I think it worked as the socket head was able to sit on at least half the area of the bush rim, were as the other tapping things i used where to small in ara and just shot off as i hit it.
worked for me...........