Amp will mount on top of the radio inside the fairing with Velcro. I'd go with these Kicker speakers, Stinger SPX700x4 amp, and the MMats 6x9 coaxial speakers.
The HU sends its signal to the amp via rca cables. The amp then sends that signal to the speakers via speaker wire from the amp to the speakers.
gotcha. I read somewhere someone had trouble installing the amp above the stereo because of the visor. They made some custom bracket. You have that issue?
hmmmm ok. My fuse panel was a little weird, only had one switched ignition source which has the fairing going to it currently.
If your fairing is already wired for the HU then use that to power the HU. The 8 gauge for the positive and negative on the amp will go directly to the battery with a 40amp inline fuse on the positive wire.