Hello Beejkay!
Good to hear from you. Please add to the threads... we need ya! Tell us about your bike... what you like about it, changes you've made.
I have a feeling that, within a short time, air-cooled B12's are going to line up with Collectibles like CBX's and BKings.. well, maybe!
Emulsion tubes: I DID change mine at some point along the way... not because I really had to, but because I was Hitting & Hoping, trying to nail down some performance flaw.
What I DID find along that route was that my NEEDLES had worn, developed a STEP up on the barrel. Fortunately the Mfr replaced them for free... despite being pretty old. Changing them did clean up the roll-on some.
By all means, check back in here. I've got 140K on my '98 B12... have been through every system on the bike now...right down to the crank bearings and transmission shafts.. so I have a bit of info.