does anyone know and good all around mods for a 91 250x. i already have an fmf pipe and sprocket and new after market shocks. i also have an aftermarket filter. anything would help.

 

A cam and/or high compression piston would help out. These will probably require a new rev box as well, so thats another thing to add. I dont think that any aftermarket companies actually produce these, but around here people use the rev box from an ATC 350X and change 2 wires around which makes it work on the 250X.