Hi there, I have a 1979 suzuki gs 750, It has not been driven in a while but runs perfectly when idleing, as soon as I accelerate it starts missfiring, please help.

Have done that, even went and bought 2 cans of carb cleaner and so on, had the carbs servised aswell as the whole electrical system. one thing bothers me though, I last drove the bike in 2004 and the headlamps dim or bright was broken and it started doing this. I dont know if the headlights are are wired as part of the electrical circiut and now that its still not replaced it doesnt complete the sirciut or so. i'm at my end with it, it idles perfectly, no missfires or anything, it only has 46 000 true km's on it but as soon as you rev it or it has to take the bikes weight and/ or mine its got absolutely no power at all. Have done that, even went and bought 2 cans of carb cleaner and so on, had the carbs servised aswell as the whole electrical system. one thing bothers me though, I last drove the bike in 2004 and the headlamps dim or bright was broken and it started doing this. I dont know if the headlights are are wired as part of the electrical circiut and now that its still not replaced it doesnt complete the sirciut or so. i'm at my end with it, it idles perfectly, no missfires or anything, it only has 46 000 true km's on it but as soon as you rev it or it has to take the bikes weight and/ or mine its got absolutely no power at all.