[spydah]

I just went through diagnosing a problem on my sisters bike and it turned out to be gunked up carbs. I had to take them apart to clean them up. I don't see how spraying carb cleaner in while the bike is running would actually clean anything. It would just go straight through the carb and into the engine. Most of the buildup would be in the bowls and would block the jets. You need to take it apart to get access into there.

On the up side, its pretty easy to do that. Seems a bit intimidating at first, but once your in there its pretty much a no brainer. Just take it apart slowly and note where everything is and its position. Clean it all up, then put it back.