What's up with the butt plug in the end of that viper exhaust. Drill that damn thing out of there. I did it to my DRz 400. Big difference after a rejet.
I've got a Holeshot Vortex on my bandit no restrictor in the end like that viper.
Otherwise...I really like your bike...kinda makes me think about going naked. By the way...what's the little yellow button on the left side of the bar for? Shifter? Nitrous? Just curious.