Exhaust and jets

Okay, so try opening them up a bit and see if anything changes. You may have an accelerator pump that is not working also but don't go down that road yet.
Open what up a bit? The jets or the four idle screws? I'm headed home from work now and going to check over for vacuum leaks on the boots
 
i have a 4 into one on mine, i didn't fit it but the carbs have all factory jets and air screws 1/ 1/2 turns out, it is near on perfect when doing plug chops at different revs and idles at 1100.
 
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