Mine might be doing the same thing... Mine is idling down and when it gets low enough, yeah it looses guages -just like when it starts up and needs to wait until it gets up in RPMs before all the guages come on. Mine is definintely and idle speed change though and I can't pinpoint when or why it's doing it. No pattern that I can find as yet. Started about a month ago and has done it every other ride or so once or twice while I'm out riding. No bog at all when I get on it or anything and I cleaned the carbs and looked for gunk or a needle bouncing around...