Hi greatmoorred
ive just taking the carburetors off my b4 to clean, because the throttle response and idle were all over the place, as i haven't been out on it lately.
after refitting them, did't do much good i was about to take them off again when i thought i try, tin of carb cleaner,
spary into the carb throat with ignition off let to soak in for a while, then start the engine and spary into the carb throats again, throttling as you do so.
which seams to have done the trick!! on my B4 but ive not yet finished put ever thing back together.
after fitting the carb back on the first time i thought the throttle cable was the fault, but after disconnect cable from the carb found it not to be.
i had my tank and airbox off at the time, and this is better, then sparying through the airbox
dek