86k cams and tensioner were all replaced 10k miles ago! Per previous owner and as I have the case open I’d believe it! looks brand new! As far as any other work I’m not sure, I just bought the bike 1k miles ago! Besides oil change, and spark plugs I havnt touched it! Road the day before for 200 miles and ran great next day got in the bike and got about 19 miles out of town and it just happens, no progression just straight to knocking