Ok so I want to really push for a dirt bike this spring and and up until lately its ben the WR250f all the way. Lately i have been considering the fact that im 6'3 210 and only just turned 16. So im planning on growing and maybe even gettin a little heavier not to mention the added weight of gear. Now i know having a 230 sum-odd pounds on a 250 tryin to tear up a hill or crank on a straight will not do it as well as the 170 pound kid on the same bike next to me. So my father has got this idea in his head that anythign over a 250 fourstroke is unnecessary weight and size to have to try and man handle on the trails. Not to mention this will be my first personal bike but i have read that the 450 is very mellow and calm out of the box and then really comes alive after uncorking it. So is my fathers perspective of the 450's out dated, I seem to think that is very possible seeing as his old bike was a yami 490 and he hasn ridden in nearly 10 years. So how do you guys feel about a new age 450 for a big young new rider and how should i present it to pops lol. Thanks for any help in advance.