Explaining how to remove a brass cap and fuel screw from motorcycle carburetor.. Also to make it easier use a new drill bit. The one I used had seen better days!!!! The carbs I used were off of a wrecked bike so I was not concerned about them, they get used for parts. Just make sure when you blow all that metal out make the carbs are not opened up like I had them. You would not want any of those little pieces in the jets!!!!