I'm wondering what bike should I get. I'm looking at either a yz 125 or 450f. I'm 16 about 6 foot and about 140 pounds. I've been riding for about 5 years in total but on and off whenever I had a bike. I drove big bikes before so the power issue isn't really a problem. I'm going to be doing a lot of sand pit riding and jumping and maybee get into a bit of moto x. Do anyone have any suggestions on what bike I should pick?