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When I bought this 2006 TW200 a few months ago, the choke (enrichener)had to be used full time to keep the engine running. Now that a professional motorcycle mechanic has cleaned the carb and replaced a broken pilot jet, the choke kills the engine almost immediately cold or hot. He is baffeled and so am I. He replaced the broken jet with the Yamaha specified #. Idle screw is out about 1 1/2 turns. The engine runs great and the exhaust pipe is clean. The bike only has 700+ miles on it. What gives? Help appreciated.....Dan
 

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Mine is the same way, but my bike is pretty beat up and there is a slight bend in the Choke pull. Depending on which way the bend is facing my choke kind of works or kills the engine. Guessing it is unrelated to yours though.
 

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the choke kills the engine almost immediately cold or hot.


So does mine from new, I thought it was normal. I only use full choke for maybe 5 seconds or it will die from over richness, then half choke for 2-3 minutes. (Only if it's cold, otherwise no choke at all.)



I do live at 6000, so it's somewhat richer here. I never considered it a problem.
 
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