I've been riding dirtbikes for about a month with a friend of mine and Now I want to buy one. I'm 5'8 130lb right now. I want a bike that I can comfortably ride now but I won't grow out of too soon. I'm 14. I want at least a 150cc, nothing less. I've been looking at Honda crf's (Ive been riding a 150R). Is this a good choice? What are the main differences between the race versions (R) and the normal CRF's??