I have an 82 CB750F and just checking my records, Bought it in 2008, 71,200 on the clock 9/08/08 at 74,400 fitted chain and sprockets 31/07/09 rear tyre. Just checked the clock it now has 26600 on it so the chain/sprockets have over 50,000ks on them and the rear tyre shows little signs of wear at 30,000ks probably a third down. Front tyre was on the bike when I bought it and I replaced it at 22,943ks 22/12/13. Chain shows no real signs of wear but I have always lubed it around the 1000ks Nothing of great interest just thought I would share
