I am completely new to dirt bikes and have no experience what so ever. I have ridden a four wheeler before. I am 5-8 and about 110 lbs. I would like to ride on trails and then after bout 4 years of riding i would want to try mx. But I would buy a completely different bike for that. Can someone please explain the difference between 2 stroke and 4 stroke? I was thinking maybe a Yamaha tt-r125L or something of that sort or would i be to cramped and want a bigger bike in a year? If that was to small maybe a tt-r 225 (not a 230 because i wanna stay away from getting a new bike for my first bike) or would something like that be better? Please help me pick a bike and tell me why i should get it. Thanks for reading.