Question about 2003 Yamaha YZ 125
Remove the fuel line from the carb. open it up into a container and see that the fuel flow is strong, and the fuel looks clean with no water in it. Make sure the air filter is CLEAN." If these are ok, then see that your spark plug makes a fat blue spark when you kick it over with the spark plug grounded. If all looks good, may be dirt or dried fuel in your carburator jets, or low compression. (Bad piston rings)
Posted on Aug 01, 2009
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Posted on Jan 02, 2017
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