Question about 2004 Yamaha YZ 250 F

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250yz revs high on idle or when clutch not engaged

I have a 88 250yz and it revs high when it is on idle. it sounds like if the choke was on but the choke is pushed down. also i noticed it leaks gas from a valve on the carberator. it turns on and runs good but as soon as i press the clutch to shift or even if its in neutral it revs high. also it takes a while for it to start after i turn it off. it seems to me that it gets flooded. any ideas how to fix or check the problem?

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  • christian972 Jun 08, 2009

    i found the problem. there was a tear in the rubber hose/part that connects the carb to the engine. it was getting too much air. fixed the problem now it runs fine and doesn't leak gas anymore

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Sounds like it is time to take the carb apart and clean or replace what needs replacing/cleaning.

Posted on May 31, 2009

  • Eldric Venne
    Eldric Venne Jun 08, 2009

    Glad you found it. They will cause some awful problems. If you were getting gas there though, you may still want to clean the carbs and check the floats to make sure it doesn't flood on you.

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