Hello all, I have a bike size question. I have a large 13 year old aggressive trail rider who has riden his ttr125L into pieces over the last 2 years and it is time for an upgrade. He is 5'5" tall and weighs about 125 pounds. I am reluctant to get a ttr230 for the fear he will be board with it in about a week but the thought of a WR for him makes me a little nervous. I ride a KLX450 but have never ridden a WR250. He is a very good rider and can keep up with us adults everywhere but the straights. Let me know your thoughts on which bike would be best for someone with his size, age and ability. Thanks alot in advance.