I used the fiber ones. I've snugged them down, ride for a while and they still seem kinda loose. I've done this about 4 or 5 times. I still hear a little click at idle but once I take off it seems to go away. Before it would tick while driving.
If you bike hasn't been de-smogged the pair valves will tick at low rpm's and go away as you increase rpm's. JAT
David