What dirtbike should i buy?

well do you wish to race, playride, or trail ride??? In that case sounds like you are looking for a lil bike that rips. I ride the crf150rb and I think that would be a great bike for you. It is a powerful bike, but luckily a 4-stroke so a little easier for a starter bike than a 2-stroke. You are around 5'5 so still a good height for the bike...for now. You may get tall for it after a while seeing that you are only 14. But, that is in the future...keep in mind though that this is a race bike...will need kept up and regular matinence! If you don't want to deal with the race bike...check into some trail bikes...like a crf230...they do make a trail bike in the 150cc range...but they are awful slow...skip it. Ride Red. :)

it depends on if you want a 2 stroke or 4 stroke. If 2 stroke then i would go with like a 65 to 100 and brands like Yamaha and Suzuki and Kawasaki so just test bikes out and see what you like as you step up bikes as you get older. If you want a 4 stroke i would get a 70cc to about a 110cc don't get a 50cc. 50cc's are really slow and small i am 15 and i have a 110 and i love the power it has and the size i also ride ATV's so. i know bikes