Yeah the 02 cr125 didn,t have a strong motor. My 04 cr125 stock was slow too, motor work is needed the transfer ports are too high. So you deck the cylinder-lowering it, port,head mod, borre carb to 40mm,icat, pc pipe,silencer,v force reed on it, I want to try a rad valve on it if I keep it,since the rad valve worked great on the 06 cr125. The 04 cr125 modded makes 37-38 hp and has a super long mid range, the 04 now is stroked and borred 22 foot lbs of torque, 40 plus hp. I,m prob. going to sell the 04 cr125 or the 06 cr125, have to make my mind up. I think a mod bike is a tough one to sell, what do you guys think. thx