Go to wallmart and buy the bicycle cable set about $5.00 one of the cables ends will fit the throttle end for the end that goes into the carb you can make the end. I show how to make this end in my carb tear down post. Use silver solder and phone wire you will need a propane torch to get the cable and wire hot enough to do the soldering. You will also have extra cables for the clutch and brakes if you need them.
Norman