<snip> but didn't realize what they were talking about because the word "cowling" was used instead of fairing :glare: I guess I know now
Do you mean the adjustable panels on each side secured with two fasteners? Correct term per Yamaha is "visor".
I used to run them in the out position until an, um, "advanced" 3 digit run and the left one blew off; my friend on his Buell 1190 had fun with that! - and of course he knows about it because I was IN FRONT of him LOL. So now I keep them in all the time. To be honest, I didn't notice that much difference anyway.
PS just about any online yamaha parts place will have a parts breakdown that you can decipher what all is attached to what, and learn the correct name per mother yamaha...