I bought these bars for my FXDB and they just got delivered today:

http://www.revzilla.com/motorcycle/b...ars-handlebars

I noticed on the website it says "Risers are threaded for 1/2"-13 riser bolts- not included". Are those bolts already in my triple tree on the underside, or do I need to grab some from Home Depot?

 

Your stock bolts should work just fine. Some people get some higher grade bolts when going taller but it's not needed.