I am new to dirt bikes and will be doing mostly trail riding but would love to experiment with track's I am 6'4" and weigh 215 to 220 lbs. what bike should I be looking at. I realize a 125 is a good learner bike but will I out grow it too quickly? I have ridden sleds for quite a while and need a summer hobby. (maybe winter too after the last few crappy ones.) Also I dont want to get ripped off by getting used. any help would be great thanks for the info guys! :p