I tried my welding tip cleaner kit but it did not have the small ones, so I purchased the K & L Carb Cleaner kit. The smallest tip on the K & L tool is .013" and the next smallest is .020". There are passages on the carb that require these tips. In fact when I used the .013 on the brass insert in the float bowl I noticed a great improvement. The .020 is great for some of the passages on the carb housing. Thanks to advice from Lancer my bike is idling and running a lot better. I had to go to a 50 pilot to cure my dying on decel problem. I run a stock muffler and air filter. Purchased the K & L Kit from orangecycleparts.com - great service and pricing from Tom.

Routy, You are right compressed air and carb cleaner should be used first BUT sometimes that alone does not work. As I observed with a magnifier, using the K & L Kit's .013 and .020 wires on brass and aluminum passages did not cause any damage to the holes. These very small tips will bend before damaging the brass or aluminum. They are made to clean brass and aluminum jets and passages when used in the proper manner. It did the trick for me.