As said above, they have rubber bushing that snap in and go though the metal floorboard below them

If U think there loose its because they move,,,,,there supposed to be that way and it for vibration dampness.

If U glue them solid U'll feel all the vibration from the motor..

If Ur ( I'll call them **** I think there's 4 of them on eack) on the bottom of the inserts have broken off The inserts would be flopping around.

And if they (****) are actually broken off I'd look for a way to glue something on that would work in there place instead of gluing them solid to the pans...

 

That's because you're riding a '06 RKC, whereas by his user name, I'm sure he's on something a bit older. Floorboards in the 60's aren't like todays.

 

http://oldbikesinsd.blogspot.com/

Matt Olsen talks about what glue to use, scroll a few posts down. He says 3M 800.

 

He said "nostalgia" floorboards. I took that to mean that was they type of floorboard he was using. As in I have the "nostalgia" theme on my floorboards and other stuff.