I am looking for a dirt bike to trail ride with. I have never owned one before. I was thinking maybe a yamaha WR250F, TT-R250 or YZ250. I am 17 and 6'4 190 lbs so size is an issue. I dont think a 125 is enough for me. Am I right? Should I get a 4-stroke or a 2? I'll probably try and get a bike a year or two old. Looking to spend around 2 or 3 grand. I'll be glad for any input. Not set on any certain bike any info or advice appreciated. Thanks