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Jim used a pencil blower to blow out the veins in the venturi cluster and the bowl immediately after washing them. You can put compressed air in one end of the fuel vein and check to see if it comes out on the other end--hopefully, a little residue will come out with it. A good way to check the venturi cluster to make sure that all of the fuel veins are indeed open is to run various sizes of copper wire through them--this is .017-inch electric motor winding wire. The wire is flexible enough to make 90* turns through the small passages, and Jim can squeeze the wire with pliers to add texture, which will help remove stubborn deposits. "Here is where patience will pay off," Jim reveals. "If you do all of the veins except for one, you know that's the one that is going to be clogged when you put it back together--so you might as well do the work now."