Disassemble the carb and clean it. Soak the parts in denatured alcohol for 30 minutes. Home Depot and any hardware store has it. Now use spray carb cleaner from the auto parts store to finish the cleaning. Be sure to spray into all the little holes (fuel circuits) and into the throttle and air screw holes as well. Put both the throttle and air screws back where they came from and screw them in until they LIGHTLY seat. Now turn each of them outward one and one half turns. This is the factory setting. Also clean the air filter and install a new spark plug ( NGK DR8ES-L ). Check the rubber O-rings on the intake manifold and replace them if hard, cracked, cut or abraded. You can order the parts from www.babbittsonline.com/parts/viewbybrand/parts.aspx This site will show an exploded view of the entire motorcycle. Please rate my answer. Thanks.
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