hey guys i have had my 2000 300ex for a while now and i have LSR +1 +2 a arms, works suspention, durablue axel, yoshi. full system pipe,holeshot,dougles,ect .... and all the motor has is a new ebc clutch I was wondering if i should send my motor out and have a 330 or 350 big bore kit or..............just wonderig if a 450 or any dirt bike/atv motor could be worked to fit in the frame and if so me and my gradfather have the skill to do it so... just give my your imput

thanx