I have a 2001 Rm 125 and I enjoy it very much. Just some things that I have noticed about my bike in case you were wondering. Even though there is a year difference I think they are pretty close to the same. My bike is pretty hard to get the power needed in a tight track it still can rip if you are good enough to ride it in the higher rpms, but on flat, hard packed ground, the thing is a yellow rocket with plenty of top end, if thats what your looking for. A PC pipe and silencer is supposed to even the power band out a little more. The yamaha's power band was great all over, and had some great horsepower. The yamaha is a safe bet, but if you want top end, plan to ride in high rpm's, and fast than go for the Rm. Hope this helped any
Mike