To see if the mains need up or down - go in 4th or 5th gear on a flat road, go WOT for about 10 seconds, let off the throttle a pubimeter...if it picks up speed or the stumble quits - up the jets a size you are lean. If it makes no difference, go down a size you are rich.

A word to the wise is not necessary. It is the stupid ones who need the advice. Pat