What motorcycle to buy my son for xmas?

u can only ride bikes on private land or tracks you pay to go on i ride my bike illegally up my local forest and mountains as long as he dnt ride on the roads he should be fine u could ask the farmer does he mind him riding on his land. pit bikes are not very good they are cheap and fun to ride with but if he wants 2 do some seriouse riding he wants a good make like yamaha kawasaki etc he would be better on a yz85 if u ask me but oviously u will pay more for it and as its 2 stroke u will need 2 replace the piston every so often.does he know how 2 ride because if he doest u need some one who knows how 2 ride 2 show him other whys hell hurt himself trying 2 do it on his own if i was u i would speak 2 some one u know who has bikes just so u know bikes need lots of maintenance and need 2 be able to some of the work on the bike or u will be paying loads 2 have a proper garage to do it