anyone help me with modificationas i need to make on my 250X to competively race it

 

yeah, find u some old stock 250r or 400ex a-armsto replace ur stock ones, they will bolt right up and give u 2in. wider on each side. on my 300ex i have some 250r arms and i cut off the top ball joint and bought some adjustable ones from and automobile parts house to make the a-arms adjustable. then i took some stock 250rshocks and relocated the top shock mount with a bracket and bolted em up.
u should get a extended axle, nerfs, aluminum handlebars, motor work, pipe of course, tires rims.......and on and on...... its whatever u got the money for