Had a notification on my British MOT certificate a few months back,movement in swinging arm bushes,not enough to fail but to take notice of.If I had the bike on the center stand and got hold of the wheel at the rear there was a slight movement in the bush,a sort of clunk was felt.After reading that the nylon bushes were prone to premature wear,I had about 5000 on the clock,I ordered metalistic bushes as a replacement..while waiting for them to come I decided to do a a dummy run on removal of swinging arm but not removing the bushes,I found no wear in original bushes and when rebuilding the original problem had dissapeared..the conclusion I came too was that it must have not been tight enough in the first place.I now have a spare set of metalistic bushes from Hitchcocks for possible future use,maybe 15000miles or more...
John Hut