Join Date: Nov 2009
Location: Lander, Wyoming
I can only guess that the silicone is heat curing. Or oils from your hands are burning off.
I wish the aftermarket pipes would use the gasket like Kawasaki does!
If you hold a piece of paper or a feather near the joint, does it "flutter"?
That would indicate an Exhaust Leak!
I had to rebuild my 1987 KLR650A1, partly because of an Exhaust Leak in that very area. The leak burned a hole thru the clean-side of the air filter box. Allowing dirty air into my engine!
The newer bikes do have kind of a heat shield in that area. But I have seen a mounting screw melted OUT!
Modify at "YOUR OWN RISK"!
Still riding my 1987 KL650-A1. 84,000+ miles & counting