+1 on the yamaha carb cleaner.. I think it retails for 11 bucks give or take. But it is well worth the dough. I had some really bad gummed up carbs, used the carb cleaner to allow them to soak for a few hours, came back and the the cleaner did most of the work for me..
As the 'ol adage says, " You get what you pay for " and the yamaha carb cleaner is just about top dog.
You can get it at just about any motorcycle dealership with a sales department.
JAG