Hey I just sold my kx100 and got a crf250r. It would be nice to know your height and weight but I would say god with the 250f. The 125 2 stroke does not have the same power as the 250f. I am not just saying get the crf250r because I have one I got it because I read about all the diffrent bikes and this semeed to be the best overall one. I dont know why somebody wrote harly davidson but they are retarded. Hope this helps.