Is the connecting screw of motorcycle exhaust pipe integrated with the engine? If not, what is this kind of bolt called? Is it a straight buckle and a reverse buckle? How to replace the new bolt when

Is the connecting screw of motorcycle exhaust pipe integrated with the engine? If not, what is this kind of bolt called? Is it a straight buckle and a reverse buckle? How to replace the new bolt when it is broken? The engine and bolt are not integrated. This kind of fixing bolt is commonly known as wire planting. It's a straight buckle. To replace this bolt, the loosening agent must be sprayed several times first, then left for a period of time, and then sprayed several times. Then find five or six identical nuts on the bolts. It is best to put more nuts on each bolt and tighten them together. Turn counterclockwise with a standard ring wrench, and remember never to use too much force, which will easily break the bolt. If there is a mixture of kerosene and loosening agent as loosening agent, it is best to spray the loosening agent first and put it on kerosene for a period of time before loosening.