A snakeskin cover for the seat would be nice... Maybe some of those old school streamers for the ends of the handle bars. I like baseball cards in the spokes too but that means you will have to buy some spoke wheels. Just answering what I read...
If you want performance upgrades... Pirelli Diablos. You can modify the air box, and re jet the carb or add a free flow air filter and re-jet.
A free flow exhaust will compliment that.
Next I would get into the CVT. You can lighten the rollers or add Dr. Pulley type sliders. Perhaps chance the clutch to a Malossi, and adjust that for more low end RPM before take off. That will give you more torque to get better 0-30 times. All told I think you can gain 4-5 HP, and 1-2 seconds off of 0-30 MPH time, and perhaps 4-6 MPH more top end.
The streamers are my favorite addition tho. Not too many fellas go for them anymore. I think SissyMary has some.