I have a 1990 Trailboss 250 2 stroke 4x4 thats giving me a headache. It has great spark , seems to get fuel, but wont start. it turns over, tries firing sometimes, but just wont get going. I had it going once giving it some throttle, about half throttle, but died out. seems like its starving for fuel, but the plug gets wet and fuel comes out of the opening for the air cleaner. i'm really stumped . if it has spark and getting fuel, it should run. I did rebuild the carb also. Any suggestions ?