What is the best way of replacing the airbox in the 250? I bought mine used and for some weird reason that I can't wrap my head around, the little nub on top of the airbox has been shaved down and it can't hold the strap. I wanted to replace the airbox but can't seem to find how to do it. :confused:

Not a job for the faint of heart. http://faq.ninja250.org/wiki/How_do_I_get_the_airbox_out_to_install_airfilter_pods%3F

Can you post some pics of the problem you are having?