If its not what Goat or Alta have suggested it might be worth looking at your valves. Your carbs could be blocked or siezed also so no fuel would be getting through or it could be too rich?
when you say you checked the coils, how did you check them ?
If they are the same as the oil-cooled gixxer coils (which I think they may be) then the leads have a habit of pulling out of them.the leads are held in with little clips - they always break, and the leads become loose.
You can pop the leads back in and seal them with hight temp silicone for a cheap job.
If they are ok, you may well just be looking for a dodgy earth somewhere.