There was a post recently about tightening up the screws on
the intake runners.
I tried it, put screwdriver on and got 2 turns. But the screws
had not worked loose. All six were in their original, 13 yr old positions.
They snapped out of their places, then tightened down.
No discernable change in performance after tighten.
I think the rubber had 'shrunk (aged) down', so, if it shrunk, maybe
the rubber is also lightly perforated. I may have a leak that can
only be fixed by replacing the rubber.
I didn't go tighten the other twelve under the tank. The bike ain't
broke (runs like scalded dog), so not gonna make the full fix now.
Opinions?
I'm with you: If it ain't broke, don't fix it. Ride it like you stole it until a problem really does present itself (Note: I'm not suggesting one ignore normal routine maintenance)