Dear Motor-Talker Community, I am currently driving a Honda PCX 125 and would like to expand the rear wheel soon to make a tyre change. In order to expand the rear wheel the exhaust has to be dismantled before, which is a bit of a concern to me. I am afraid that the exhaust has entered an insoluble connection with the cylinder head. If I understand it correctly, the exhaust with 2 hat nuts is attached to the standing bolts on the cylinder head. Is this concern justified or rather unfounded for scooters? Because rarely jammed? What is recommended for reassembly in the hat nuts and on the standing bolts to be able to solve the connection again in a few years without problems? Copper paste? Ceramic paste? Or something else? Thank you for your advice.