I just got done almost fully rebuilding a 1991 cr125 and when I went to go ride it, it just had no power at all. I cranked the throttle and it would hardly accelerate and kind of bogged. And it would never get into the power band. What is wrong? Is it the jetting? If so what jets should I change and should I go bigger or smaller? Or is it an engine problem like the timing or power valves? Any help would be appreciated.