hey, im upgrading from the pinny 125 and am goin for either a yz or crf 450 as soon as i have the cash, as ive been riding my old mans 426 a fair bit lately and am liking it. ive also ridden the yz 450f and loved that! i know the yz's have the 4spd box, but what have the cr's got in em? wasnt sure which one to go for? what are the PROS and CONS of each bike???