I pretty much grew up on my cousin's XR80 (154lbs) and TW200 (260lbs) and decided that I would rather get a too small bike than a too heavy one. You see on the tight trails the little bike was so light and flickable that it actually got away from the 200. Now I am all grown up (6 ft 160 lbs) and want to buy an CR80 expert. Everybody says it is too small I must get a 125. I have never stood next to an CR80 but the website says the seat is 45.5 inches tall. That means my legs will be almost straight if I put my feet on the ground. And it is not much smaller than a CR125 (seat height 37.3 inches). I am going to ride on the trails and would like some advise if I am making a mistake or not and if so why?