Unknown (yet) problem

[Disorderlypunk]

there might be a way to clear crap out of the needle valve without taking the carbs out but dont hold me to this



pick a carb  (one at a time) and put on a drian pipe and drain into a petrol can then turn ignition on so fuel pump starts running
as the drain screw is open you will get fuel flowing at full whack through that one needle and may dislodge the bit of crap (if there)
ignition off, drain screw tightened and repeat to other carb bowls.
shouldnt take more than an hour i would have thought and is only a theory.