Will the hard bags off an Ultra, fit a R/K Classic the same year, Are the brackets all going to fit or would I have to buy different brackets????

 

If you go to Ronnies HD Parts website you can look at the parts breakdown of your bike and compare it with the Ultra, to help you answer your question. The base bike is identical, so the answer has got to be 'yes', just a matter of how many parts need to be changed, if any!