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hi, My son’s 2003 GT125 fuel tank has three connections under the tank. One is just a vent pipe. Of the two which are left which one is the reserve and main fuel line please?
the valve should have a big nipple and a small nipple the big nipple goes to the square valve which then goes the the carb (main line) the small one underneath then goes to the rear intake manifold( vacuum)
the third pipe separate from the valve is just overflow/breather