Gas running out overflow hose fon carbs

Murtaza Akberali Versi

• 767 Answers
• Posted on Feb 13, 2009

SOURCE: 2003 WR250 F - eng. won't idle down and carb starts to overflow

Hi Jwelden,
Have you checked the float level in the float chamber?
I guess you may have to reset the float pin adjustment, its allowing more gas to pass through thn required and thus the overflow!
Not bad too, when you are working on the float assembly take the opportunity to blow out the fuel line from petcock to the carburator via the seat for the float pin,any foreign particals there would stop the float pin to seal up and thus overflow.
Fit in an inline fuel filter , this will help keep out the dirt or whatever.
Hope this helps.

Knight (Yamaha Seca XJ750A 1981)

SOURCE: fuel constantly leaks out of the overflow(?) tubes

hello
sounds like two problems. one a possible charging system failure and a carb issue. the carb issue you are haveing is what is a result of a float valve sticking. they can stick or hang open for a couple reasons, either dirt getting into the fuel line, or buildup causeing the vavle to become sticky and not function as well, or a worn float valves wont seal as well. when the float valves dont function and regulate the fuel, the excess goes out the overflow. to correct this the carbs need removed and the float valves inspected for which fault you are encountering.
the headlight drain is most likely caused from a no charge condition. with the bike running above idle. you should be able to get a 13-15volt chargeing voltage while testing at the battery terminals. 90% of the time this is caused from a faulty rectifier/regulator.

SOURCE: a lot of gas coming out of the carb. overflow tube, eng on or off

the float pin is stuck or has some dirt in it. try tapping the side of the float bowl(s) with the handle of a screwdriver... not hard enough to break it. if that doesn't work you will likely have to take the carb apart and clean it.

SOURCE: on my 2004 yamaha 660 grizzly there is gas coming

You do have a sticking float. You can test it with the bowl off by moving the float up to shut off the fuel, and down to allow fuel to flow. Look closely at the float needle seat to make sure they aren't damaged.

SOURCE: Gas is coming out of the carburetor overflow hose

check for a bad float. a float with a hole in it will 'sink' and thus, not turn the gas supply off when required.

Let me know what you find.

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