1996 cr250 running extremely hot, way hotter then any of my previous race 2 strokes. Took off the radiators and hoses and they are all clear. Also checked the water pump and its working fine. Even with new coolant the cylinder, pipe, and bottom end will burn your finger if you touch it, and it is boiling off/losing coolant every ride. I thought jetting could be the culprit but the plug looks near perfect (doesn't look lean at all) Im so confused!! any ideas??