In an effort to regain some of my 1,200 to 1,500 posts I lost a year ago or so during the website changeover, I thought I'd make a separate post
... (heh,heh,heh... there's more than one way to skin a cat) LOL
Actually, I just thought of it (... idea that is).
I don't think reaming out the 32 mm hole in the urethane with a 34 mm reamer will work. The durometer of the urethane is too soft to support that sort of cutting tool effectively (IMO). Probably the best (and most accurate) way to accomplish this would be to mount the bushing to a plate and retain same in a milling vise. The larger hole could be machined by plunging a single point tool through the existing bore (an undersize hole is required to allow for a small amount of bushing crush or preload when tightened). Or, a more crude approach could be to mount the bushing as above and feed the appropriate hole saw through the bore with a drill press. Of course, the vise and table would have to be clamped after finding the center of the existing bushing bore otherwise you could have a real problem.
Another idea would be to retain the bushing as previously described, generating the hole progressively larger with a small diameter sanding drum, say, 3/4" or 1" in diameter. This would be a straight sided sanding drum, tapered sides would only lead to complications. With a die grinder and reduced RPM (you do not want to burn the urethane), progressively rotate the sanding drum around the inside of the bushing bore, periodically checking your dimension (at several different points to ensure roundness of the hole).
And lastly, if you are good with a die grinder and have SHARP carbide burrs (not that you really need carbide... it's just I find they are sharper than their high speed steel counterparts), I would generate the size of the bore out to the desired size. BUT, this would require extreme attention to accuracy otherwise you would ruin the bushings if you went oversize.
Just a few ideas.
