Thanks for all the info in the past, It has really helped me pick a bike. So I have been looking on craigslist. I have been searching for the crf150 but they are way to expensive. I found a ttr 125 which looks small enough for me. Remember im 14... 5 foot and weigh 100 pounds. Is it a good motocross bike.? Is it a 4 stroke or a 2 stroke, and is it good for beginners like me?. Thanks