Picked up a leftover 08 WR250R in January. I've added some accessories, but no performance mods... yet. Still got less than 100 miles on it, so I haven't been able to see what it'll do yet.
Carbon Fiber rear rack
Ram mounted micro tank bag
Ram mounted GPS
Heated Grips
Aluminum bark busters
Corbin Saddle
Throttle lock (cruise control)
Trakmaster tires
Bead locks
Sawed off tail section (custom license plate mount)
Skid plate
I've also got a DR650SE, and a Roketa 250 scooter (Laugh it up), as well as other offroad stuff.
Past street legal bikes include: 06 KLX250S, 94 KLX650C1, 99 Concours, 91 VX800, 86 Nighthawk, 01 Marauder, 80 CM400