hi i dont ride any more stop a couple of months ago a crf 150 is the same size a a big wheel 85 so i wouldnt go for one of them, a 250f wil be your best bet, i am 16 now and i started riding 125 at the age of 14 and it was fine for me even thou i couldnt really put my feet on the ground, but as the ban is cuming in go for a 250f hope this has helped benny boi