i fixed-ed my 2 stroke, still thinkin about 4 strokes

, i just want a bike i can trail ride with easier i tell you its hard riding behind my dad when i wanna crack that smoker wide open and scream though the woods, i mean im no dungey but my dads sloooowwwweeerrr than a turtle,but then again iv heard alot of horror stories of 4 strokes, i would like a nice trail bike but i want to race mx and cant afford 2 bikes, and to get a new bike i have to sell my current bike which i cant afford a newer model 4 stroke with what i would get out of my rm, i mean i cant even afford a crf230 and if i get a trail bike i want a wr250f,im
in a real pickle here.