r or what

Hello, here is a Pic of my new to me, 2002 Yellow Aprilia RSV Mille R. 1.What are the best Mod’s to do to this bike? 2.What aftermarket parts are just ****, and I should stay away from? 3.What Mod’s are a waste of time? 4. What Exhaust System makes the most HP 2-2 or 2-1? 5. I notice that you...