Eventually if your barrels go to the same as the one on my old XS, you will be able to turn the ignition on and remove the key with the engine running.
I have a friend who lost a key as it vibrated out when the bike was moving.
Like I said above, Yamaha Ignitions
Vaseline in the barrel used to be a service item years ago, I don't know if it still is.
And It probably never got done, like door hinges on car services, one of those things that just gets skipped over
I did Vaseline regularly my TDM, which I brought from new.
and in the 4 years I had it there wasn't any noticeable wear.