Hey guys so I and my cousin want to finally buy a bike and start riding. I have no experience on a dirt bike but good skills on a bike (don't how bike skills transfer onto a dirt bike) and my cousin has around 8-10 hrs of experience on a Crf150f. I'm 5'9 and 120lbs and my cousin is 5'11 and 130lbs. My cousin who is 16 would like to buy a kx100 because he thinks the 125 will be to much. But I think with his size he is to big for it and should start off with a 125 like I want to. Would this be the perfect starting bike to learn the fundementals of dirt bike riding ? We would most likely probably buy a yz125 if you guys recommend we start of on a 125. So please any help/tips and advice will be greatly appreciated. Thank you and have a great day.