Carb advise

[spareparts]

don't use a strong chemical on those carbs, Yamaha cautions soaking them in traditional carb cleaner as they have a clearcoat on the aluminum to seal up the porosity of the aluminum. I generally use Mercury power tune to clean out carbs, just spray it in a cup and soak out the little parts, fill the bowl after stripping the carb, and set the main body on the bowl just like it would be sitting if it was on the motor, after soaking, go back and spray some power tune thru the holes and blow them all out. Stay away from the welding tip cleaner, it will change the orfice size of anything it goes thru( I use the tip cleaner to fine tune quadrajet carbs). My wife kept complaining about the chemical smell from the garage after I rebuilt a set of carbs, so I took a hint from Yamaha, and bought a sonic cleaner from Harbour Freight. It works great, just tear the carb down, fill the cleaner with water and a splash of purple stuff, turn on the sonic and the heat, 15 min later its ready to be blown out and reassembled. The carb on the lawn mower picked up some crap the other day, I pulled it off, took it apart, threw it in the sonic cleaner(gaskets and all), two beers later, the mower was back running. The Harbour Freight cleaner isn't the best, but it works, I'm going to get a bigger comercial unit one of these days. With power tune at $9 a can, I've probably run at least 30 carbs thru the sonic cleaner, its paying for itself