Ok I am showing my ignorance here, I took it into the Garage next door to work, to have him try to balance the carbs, as I thought that was the cause of my slow running problem. He reckoned I have one or possibly two bent Valves, this is the cause. It seems beause they aren't seating properly the back pressure is not right, hence the slow running problem. It sorts itself out at higher revs, but I am probably loosing power.
In order to check if they are bent, he said he needed to do a compression test but didn't know the correct values. The Brooklands book doesn't seem to give it. I have just bought Pat Braden's 'Bible', but I haven't found it in there yet.
I can see where you two are coming from, but I am just going on advice ATM.
No Rick haven't revved it too much, alegedly they are prone to it??. I have a reciept for a repair of a bent Valve, from 1997, at about 6000 Miles ago, perhaps there is something out of kilter somewhere
I do have the spare Engine, so it might be I swap the heads over, but it depends on reletive conditions.
I can feel a pain in the Wallet coming on.........