I just got my bike, 2010 Ninja 250.
With a little help from my friend I have done a few things to it already. We removed the charcoal canister, the PAIR system and the ugly "tail" fender and the passenger pegs(I wont be riding anyone on the back for quite a while)
The exhaust hanger is just a piece of strip steel with a little bend in it.
We removed the charcoal canister and plugged the middle port. To vent the fume port, we t-ed into the over flow for the gas filler
For the PAIR system, we just put caps on the top of the head and on the airbox.
To remove the rear fender without spending a bunch of money, we cut off the long fender and the mounts for the turn signals, then smoothed everything out a grinder to make it look clean. To mount the plate, we used a small piece of angle iron and mounted it under the small plate that bolts down thru the tail. For a total cost of nothing, I think it looks pretty good! Ha. We then mounted the turn signals to the side reflector mounts and that bolts to the license plate.
More stuff to come! Hopefully exhaust soon. Then airbox stuff and carb stuff too.