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Poor performance caused by carburetor• By adjusting the carburetor: • Phenomenon The engine starts well when choke closed, and stalled when open the choke. • Solution The fuel in carburetor is too thin, needs to be adjusted • Phenomenon Engine hunting at idle speed • Solution Close the choke, engine stalled, means the fuel in carburetor is too thick, needs to be adjusted Close the choke, speed goes up, means the fuel in carburetor is too thin, needs to be adjusted • By changing the carburetor 1. Any problems caused by carburetor 2. Cannot reach the high speed (based on the insulation gasket and cam timing point assembled correctly) 3. Bad transition performance |