Tpi bike as mx bike?

Hi! Thinking about buying a 250 or 300 tpi KTM/Husky, i ride mx and Woods 50/50. Racing in both diciplines, been riding for about 10 years, 24 years old and not afraid of hangin it out. So the bike will get pushed hard on mx tracks.

Suspension will be conevalve or revalved stock suspension.. But how will the fuel injection Keep Up? Since the bikes probably aint made for racing deep sand conditions. The oil mixture seems to be pretty much on the lean side?
Maybe im just paranoid but does anyone have some experince with riding theese bikes in heavy mx conditions?

Oh and btw, i can only get my hands on a exc and te model no xc's etc.. :/