Ok fellas if you would be so kind. just got the monster up and running nothing to serious happening other than the odd rattle and stuff that will settle down once it's all bedded in, but something is annoying me tho and want to ask if it is a problem or can I ignore it? What it is , there is a puffing type chuffing noise from the left hand exhaust, it's not there all the time but more often than not. I checked all the valve clearances when I rebuilt it but it's possible I might have misread one, the plugs are ok and have a whopping great spark and the battery is ok, fuel is new and I have rebuilt the carbs so don't think it's them but just stumped as to what it could be. Found that the throttle cables are really tight and it is reluctant to shut completely off, I have them off at the moment and will be rebalancing the carbs this PM, but this bloody chuffing noise rings a bell in my head about something to do with this sort of problem but can't for the life of me remember what it is that makes it do this , hoping one of you might have a better memory. Thanks all.