Reply To: Is it possible to convert GV250 carb model (2007) to run an electric fuel pump?
Get a good quality motorcycle tyre tube and rubber glue in your country that supports “HIGH HEAT” , and wrap around the intake intake pipe and patch it careful , that should help give it more life until you get replacemennt rubbers.
Sooty plugs also mean air filter is dirty (causing rich condition) , if the coils and caps are okay. Try fresh CR8E plugs and ride a little bit, then see your true plug colors again.
Spraying carb cleaner at the intake pipes helps (it has o-Rings under it) , sometimes they need replacing like these below
Intake Pipe O-RING (Inlet Boot Seals) x2 – GV125 GT125 RX125 GV250 GT250 Hyosung
Also spray around the airbox on top of the carbs, incase airbox is not sitting on carbs properly. It might leak out air.