Reply To: [How to Tutorial] Change Vacuum Lines on Hyosung GT125R GT250R & GT Comet (Air Hose Diagram)
P = blocked with a fat bolt or bung, that stops the fake emissions pump. also block the hole UNDER THE AIRBOX (where P was)
B = overflow / crash drain pipe , it goes to the GROUND (the lines goes along frame till it sees the floor, AWAY FROM EXHAUST PIPES)
C = to tank #2
Tank #1 = Fuel overflow to the ground (like your carb as i explained) , attach a long hose there , and run it down the suspension
A is correct = that’s called REAR PUMP | More info about is at the original post ^
The fuel tank lock cap has its own seals and is a spring loaded mechanism, so its always sold as one piece sadly , sounds like you had a fishy device then.