Welcome home...although your timing could have been a bit better, in that you've arrived just as the weather is going to get cold, wet and gloomy. You probably already knew that. Hope you kept some good friends as contacts in the balmy southwest, where the brutal heat is giving way to a warm, sunny winter. :o) Not sure exactly what you mean when you say your fork is leaking (I assume you mean the fork seal?) but I'd take it to the AFJ Race shop (http://www.afjraceshop.com/) on Eastern Ave first and talk to Brandon or Eric. There are other shops that are qualified--Cadre (http://cadrecycle.com/motorcycle-service-and-repair/) and Pro Stock Performance (https://www.facebook.com/pg/Pro-Stock-Performance-Dyno-194361860610764/about/?entry_point=page_nav_about_item&ref=page_internal) come to mind--but they're out in the suburbs.
There are a few groups here in Cincinnati that would be reasonable first contacts to connect with the biker community, and then filter out what doesn't have relevance. I'd check out Cincinnati Cafe Racers and LocalRiders on FB Groups, where you'll find a list of meet-ups in the area: Comet in Northside every Tuesday night (everything you could want in a bar--hipsters, surly waitstaff, and burritos bigger than your head!), Fuel Coffee on Riverside every Saturday morning from 8-12 (cars and bikes), and Northeast Tuesday Bike night every other Tues in Milford by MJ's on Main. You just missed the MotoberFest event but the next worthwhile gathering is the Alley Meet at Fuel Coffee on Sunday morning, Oct 9th, 8-12. Big gathering that Fuel opens for on Sunday (normally closed) prior to the Devil's Staircase Hillclimb event in Oregonia. Guaranteed to keep you entertained for an hour or two, plus good coffee, lattes, mochas, and bisquits'n'sausage gravy.