im 15 years old and have experience riding yamaha banshees and a small (i think 90) honda t-rex. i want to get a dirt bike, but not sure what size to get. I was think about a yamaha yz250f, because of my great experience with the banshee (which is now totaled because of my dads friend). The Honda Crf looks great too though. im 5'7" and im growing fast. please reply!