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The 3/4" fuel line is all that I attached (not the reserve or breather line).

There is no reserve line,,that is a vacuum line, you need a hose on it that runs to the right side carb(right if you are sitting on the bike). There should be a port on the inboard side of the carb near where it hooks to the intake(engine side).

vacuum hose diagram.

BTW,,it is a petcock,,I think it is short for petrol cock,,sounds like a Brit thing to me,,basically it is a gas valve.
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