I am new to the forum and small engines in general so be warned....I just bought this bike and have replaced the spark plug, cleaned the jets on the carburetor, and new gas....in that order. It still doesn't want to run properly. It will start right up with out the choke on and run fine sitting still...When I give it gas it goes till about 3/4 throttle then it starts to bog down, and misfire. I'm guessing the engine is getting too much gas....then when I come to a stop so does the motor. Seems to be idling at a good speed but, I don't know. Any ideas. Should i just replace the carb? I set the fuel/air/mixture screw back to factory setting... still nothing going right. HELP.