I have changed bars on my Fat Boy, Wide Glide, EG and RG everything from Wild1 513,575,517 and Flanders and WG on my RG... Never had to do any cutting - stock wires always worked... with the 517's, Ya I had to change the clutch cable... but all this work you can do and you will feel real good after the work is done and you will save that HIGH HD labor $$$$$$$$$$$$$$$..
very "can do" job, esp if you are NOT going internal wiring...
Lots of people here can and will help you out..
DO IT,,,,,,,,,,,,,,,,,,,,,,,,