i just decided to clean my carb and whilst it has made a difference to the "performance" of the engine it is idleing a tad high. when its been run the revs drop from about 1400 to just about 1100. i knew this would happen since i scraped a good 2 mm of crap from inside the carb so it has let the gap between the carb and the wall bigger! is there a way of adjusting the idle setting on the carb itself?