Hi i am having difficulty balancing the carbs on my 1976 cb750, to get the gauge needles to point to the normal section of the gauges the adjusters on the carb tops are almost right at the top, or does it not matter where the needles point as long as they are all the same? also it seems to rev ok when its being balanced and is hot but when i take it out and go for a ride its like its miss firing ans backfiring but the ignition is spot on, any help would be grateful. thanks Ayjay