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Old 03-26-2004, 08:15 PM
Dirt Surfer's Avatar
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Default Carb Question

     

I have a quick question, lately the carb on my o1 cr250 has been peeing fuel out of the overflow hose anytime the fuel petcock is on. I took the carb off today and took it into my local dealer. He measured the float for me and said it was like 3 mm out of spec. He made the adjustmentment and I was on my way. Put the bike back together thinking this was surely the fix. Wrong, fuel still peeing out of the overflow when the petcock in turned on. What else could be causing this issue. This also tends to foul plugs on cold startup. Any help would be greatly appreciated. I can't seem to get this one fixed.

Jay
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Old 03-26-2004, 08:21 PM
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Default Re: Carb Question

Jay, sounds like the needle and valve might be wore out or just some crud keeping it from closing properly. Pull the float out and check the needle...does it have a pronounced "groove" where it seats? It just might need to be cleaned. Tdub
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Old 03-26-2004, 08:23 PM
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Default Re: Carb Question

Won't most bikes do this if the petcock is left in the on position for an extended period of time without the engine running?
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Old 03-26-2004, 08:30 PM
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Default Re: Carb Question

Nothing jumped out at me today while looking in the carb. I see no dirt or wear, not to say that is not the problem though. I will check it again tomorrow. I thought for sure that fixing the float height would solve my problem. Exactly how does that assembly work? When you turn the throttle, that needle is raised and lowered in the seat allowing fuel to enter the bowl?? If it does not have a nice interference fit then fuel will leak out? If I find that it is clean, do I replace the needle and the seat or just the seat? I am not a carb guy, but I am learning.

Jay
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Old 03-26-2004, 08:33 PM
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Default Re: Carb Question

Jay, even if your loat level is set correctly, if the needle and seat are worn it will allow fuel to get by and fill the bowl causing what overflow. Check it out. Tdub
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Old 03-26-2004, 08:37 PM
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Default Re: Carb Question

I will do so. Supposed to ride at Baja in the morning. I will check it out. Might this also cause me to foul plugs on cold startup. Once I get it running, it starts first kick all day, but the first start is tough or impossible without changing the plug, then becomes first kick with new plug. Thanks for the help!!
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Old 03-28-2004, 10:52 AM
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Default Re: Carb Question

DIrt, are you looking at the right needle,,,raises and lowers with the throttle?? are you looking at the needle on the slide???

The needle you should be looking at is on the pin end of the float assembly? did you watch the float being set?? the needle is right under the tab. GET A MANUAL.

in the meantime go to hondaoftoy.com and look up your model carburetor on the OE parts finder,,,see the parts breakdown,,find the float needle.

MONOSHOCK. No, they sure shouldnt leak fuel like that if the float is set right or even close.
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Old 03-28-2004, 10:55 AM
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Default Re: Carb Question

And oh yeah dirt,,that will cause flooding. your float level is way high,,and on the ride out to the track etc in your truck the fuel may run down the throat of the carb as the truck turns and brakes etc. then you unload it with an instant foul,,gas on or gas off.
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