What should I do if the motorcycle exhaust pipe doesn't come down? What should I do if the screw embroidery dies?

Your car is Honda 50 imported from Japan. If you want to change the muffler, you must take it apart. The screw is rusty. Put some gasoline on the outside and wait a few minutes before disassembling. If it can't be disassembled, drill it with a hand electric drill. The screw is six times as big. You drill four big ones first, then use five big ones. Finally, wash the screws, understand?