sorry for double post also my opinion is learn how to ride a minibike hard and fast and jump long high and all that because if you get a bigger bike your not going to be any better most likely kill your self
so if i was you if you cant ride a mini bike at the best of your ability then theirs no point getting a big bike
until you can real ride hard because 125 and 250 mx bikes arnt for riding around slowly and learning
they were build for competition.
but hey that's my opinion