Welcome!
Moved last year from Tempe to Boston. First piece of advice: beat the heat.
Second: Stop by Bob's Salvage on Elwood (not Bob's the Harley shop on University). Biggest yard of Japanese bikes in the US, plenty of CB/CL stuff (I picked over the 350F and 400F bikes, however), great guys (might take a couple visits for them to warm up, including letting you scope the yard and pull parts on your own), and they've got a huge shop full of new parts for your bike too (carb kits, tune up kits, levers, etc.).
Third: dude named Brock runs a cool business doing fab work (mostly choppers, but he's open minded and has great welding skills): http://www.dunlopcustoms.com/ He also organizes a meet up, I think it's every Wednesday at the shop.
Fourth: Jeremiah at Love Cycles does an event once a year, usually in February or March. Again, it's Phoenix, so it's mostly choppers, but he's a good dude and open minded.
Fifth: Hit the swap meet every May at the Shriner's digs near the Chinese Cultural Center. Mostly choppers and Harley stuff, but I've found some cool stuff there too, and it's a great show.