Question about Yamaha WR 450 F Motorcycles
1989 yamaha warrior 4 stroke been in storage 3 years, starts and runs ok but sometimes (alot of times) when I turn on the gas valve gas runs out of the carb overflow. I flushed carb but still does it.
It doesn't take much to hang the float valve open. The smallest speck of dirt or debris will cause the float valve to not shut the flow of gasoline off. After sitting for that length of time, the carburetor needs to be completely disassembled and cleaned. Use an automotive carburetor cleaner (but do not put any plastic or rubber parts in the carb cleaning solution as they will be eaten up). While you've got the carb apart, inspect the float valve. Replace it if there's a groove worn into the tapered seat. Installing an in-line fuel filter may help, too.
Posted on Nov 16, 2009
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Posted on Jan 02, 2017
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