Originally Posted by flyinwalenda
I understand the stock muffler will come loose if not sealed properly as it did for me. However, after being properly sealed and locked I have two that are holding tight after 3 gallons of fuel and the same goes for many other owners. I'm not sure what some of you are doing or not doing where you keep having stock muffler issues.
I have to say sealing all the joints with silicon gasket compound as well as applying it to the nut worked for me. I also used the gasket compound on the muffler to engine faces, without the standard gasket and worked for me as well. They say tightening up when hot helps but I would have thought the aluminium body would expand more than the steel bolt and hence tighten everything up when hot anyway.