Exhaust gasket (copper ring) Delta, Fermer — an exhaust sealing ring for Delta and Fermer mopeds. The copper ring is installed at the joint between the cylinder exhaust port and the muffler inlet pipe and prevents exhaust gases from escaping.
Time to replace it if you hear a popping sound at the joint, soot is visible on the pipe, or the muffler has become louder. The ring gets crushed, so it is better to fit a new one after removing the muffler. Compare with the old part or check by phone.
