Question about 2003 Yamaha YZ 250
With the symptons I think you need to clean the carburator , it seems it doen't get the fuel at all, thts why you hve to spray the carb cleaner to start it !
Remove the bowl of the carb and see if theres fuel coming in once you switch the petcock to 'ON' postion, if it is coming thn prolly the float is too tight (whn the bowl was fitted) thus not allowing the fuel into the float chamber, you will need to adjust the float.
Check the condition of the bowl inside if it has the rusty powderish residue, it will require cleaning and blowing off the jets both the poilet and main jets.
knight (Yamaha Seca XJ750A 1981)
Posted on Apr 17, 2009
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Posted on Jan 02, 2017
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