These are a few mods I've made.
Side mount license plate bracket.
Chain & Barb Wire pegs
I reshaped the seat foam, and removed a lot of it,which required me to make a custom seat cover.
A small rack, mainly a bungee hook rail.There is sheet metal under the small barrel bag, that keeps things offf the light.
This is'nt a mod, just a goof. I hit a tall road cone while slolaming at around 70mph. I struck the cone with the lever, which pinched my fingers between it and the grip, bending the lever a little. I also bent that mirror on the cone. The person riding with me got a good laugh, as did I after the feeling came back to my hand.

i'm using stunt pegs from a bmx racer. they work as matching front, rear, and hand grips.  came out sweet

I have to agree, those are some of the most cool pegs I've seen in a long while. All they need is chrome.