Well my girlfriend has been riding my 250F for the last summer but it doesnt seem to fit her. She can't start it very often, has problems on trails and I just think it might be too big for her. She's about 5'5" and weighs probably around 130 or 140. I can't decide if a CR125 or a CRF150X would suit her better. Anyone have any suggestions or comments, let me know! All advice is appreciated.