g'day, I'm an aussie to, I live here in LA. I'm origionally from Maitland NSW. I'm completely useless at merchanical things so therefore I'm a complete nut on maintenace, my mechanic said my 2009 engine didn't sound right and because it was still under factory warranty he told me to take it to the dealership, well after they messed around a bit the company sent me a new 2011 engine, now this dosen't include the primary case. my mechanic said that I should get a updated compensator he said they didn't have them in 2009. So I did,and as I said all the rattle went away and there is an instant smooth flow of power from the engine to the transmission without the clunk I would normally get, I asked my mechanic when he put the thing did it look diiferent and he said with was 100% different the old cpmpensator looked flimsy beside it. the one I put in was an screamin eagle 402 74-08, if you check around the website other people should have comments on it.
by the way if you ever come up here for a bike ride, I do the Run for the Wall every year, its from LA to DC, I would highly recommend this for your first ride in the US. website is RFTW.org
all the best