When I was younger I used to dirt bike a tun, rode a little Honda 50 and then a Japanese 80. Then I stopped, I'm 17 now and looking to get a bike for this spring. But not too sure what to be looking at 150cc? 250? Need help choosing! Bike would mostly be used for the mountains and jumping. Track once and a while. Please help not sure if this helps or matters but I'm 5ft 7, and 145 lbs thanks