I've got the carbs back on the bike after stripping and cleaning them, I changed the seals on the pilot jets while I was there as they looked a little flat, so now I know the carbs are dirt free and the float heights are all identical, just got to get some spark plugs now the run and balance them to see how it runs, I'm pretty confident it's not the coils as you would get running problems when loading the bike up in higher gears, the only fault I have is a stutter/hunting at idle and small throttle openings.

took my bike down to a local bike shop spoke to the guy that owns it explained to him as best i could as to what it was doing told me to take the carbs off and drop them back in at the shop which i did turns out it had the wrong jets in bike running  sweet as a nut now 

Could it be the float bowl height? I had this on my bike engine kit car......sluggish/misfiring/struggling below 3000rpm and also at WOT. We (well..Dave Wood) changed the float height and sorted it