RE: How to keep muffler bolts tight
You got that right, someone told me that the head due to fuel residue still left in the muffler cause rusting on the screw parts and weakens the shaft , they should be removed once and a while for inpectons, I only lost one , the other would get loose even after locktight applied. it seem like the wrong metal is used for those bolts and changes with heat.
roltech