Yup, call him and see... if needed tell him I suggested you to reach out to him... might help, not sure... he will likely have a greater incentive if he is sourcing the tires too...

Usually, dealers have access to place such orders themselves - i would talk to the dealers to place that order on your behalf and get it installed... i have done that with Jeb at Tapped Out for e.g .

My favorite shop for Jap bikes... Try Jeb at https://tappedoutcycles.com/ He can recommend, buy and install them for you...

Do they still make a gas cap for your bike?

You are "rumbling" too much playa!! ;-) More seriously, did you try spraying WD40?

Just uploaded a pic and wrote a few words about interests... pretty cool little home for the riders to hang around!! ;-)