I normaly remove them by using two 5mm thick washers (spacers), a large dia tube and a M8 nut and bolt.

One washer is 0.5mm smaller dia than the outside dia of the bush and gets placed on the back with the bolt passed though it.

The tube (1mm bigger dia than the bush) is placed on the other side of the frame with the other 5mm washer (the same dia as the tube and bigger than the first washer) placed on top of that. The bolt passes though all of them with a nut spun on the end.

Tighten the nut up and 9/10 time you will draw the old rubber bush out.

If it refuses to move then we tend to cut a slot from the center hole out to the outter edge of the bush. Then use the above method again.
_________________
If I have to take the carbs off once more...