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most engines have a low speed needle valve
2012-06-07
Low-speed Needle Valves are very touchy. You only have to move them a hair to make a huge difference.
Most engines today have a low-speed needle valve. This is a little different than the high speed Needle Valve. The low speed needle valve is locate in the carburetor. This entire assembly seen in the picture to the right is commonly referred to as a