hey im 22 190 lbs and lookin to buy a dirtbike ive ridden only a few times before so im pretty much a new rider i want a decent bike where i can ride on the farm and take on some trails ive been lookin around for used bikes dont know wat to get .. any suggestions ? 2 or 4 stroke i hear it is a wiser choice to g owith 4 stroke these days they last longer and good for begginers .. please let me know thanks