Firstly thanks Rob, Resi Blue Midlife everyone for the responses. To answer your question Rob there is about 30k kms up on her or so the odo says. Im inclined to believe it tbh. Resi i changed that crank oil feed seal on the clutch cover with a new one in the rebuild but il check it anyway tomo. Anyway heres the vid . http://s982.photobucket.com/albums/ae301/columandester/?action=view¤t=MVI_4278.mp4 Did id as ye guys suggested and there seems to be decent tension on the cam chain. The balance chain seems a bit slack but i didnt think it was excessive. I had just previously tensioned it and the noise was still there afterwards. There seemed to be a hell of a lot of lateral play on that big starter ring sprocket. I read its meant to have some play, but that much? All the sprockets i could get at seemed ok and not loose. There was however petrol in the oil. I checked the oil level on the dipstick before dropping it (pretty much the same level as always) but smelt it as i always do and it was evident there was petrol in it and the oil felt thin. I dont think its the problem though as the oil i dropped today has less than 20 miles on it and the previous oil was grand when i dropped that and had less than 1000kms on it. I did lately forget to turn the tap to off for a week so that may explain it if there was a sticky float. More work and so much for my carb refurbing skills eh:eek1. Changed the needle valve seals and had everything sparkling, new filter too. Anyway, just to to be clear, i noticed this noise at idle after a dyno run and sustained 75 to 85 mph motorway run home (about 50 miles). If you guys are happy my tensioner is ok (seems to beor am i wrong?) and if the starter ring is ok that leaves the crank/conrod??