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cleaning carbs on atv

hk-91hk-91 Member Posts: 10,050
edited June 2008 in General Discussion
How big of a job is it to drain old gas and clean carbs on 4 wheeler. I bought a 2001 big bear 250 and i think the guy left last years gas in it. its starts up and runs good for awhile but then starts to boug down and stall. acts like its running out of gas. I was told by dealer that carb probley need to be cleaned. just wondering how big of a project this is.
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Comments

  • rufe-snowrufe-snow Member Posts: 18,650 ✭✭✭
    edited November -1
    Pull and change your plug first.


    Then add bout 4 ozs of Seafoam to the gas before taking the carbs apart.


    Every couple of weeks I've been adding some Seafoam to my gas, it's helped me some.
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  • CHEVELLE427CHEVELLE427 Member Posts: 6,750
    edited November -1
    PROBLEM COULD ALSO BE IN THE TANK, that valve that turns the gas on and off could be stopped up, or the filter if it has one
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  • Sig220_Ruger77Sig220_Ruger77 Member Posts: 12,754 ✭✭✭
    edited November -1
    +1 to what rufe-snow said. Just as a note, I leave(although I usually go on a ride to burn most of it up before winter) gas in my atv all year round. I also throw in Seafoam when I am not using it during the winter months though.

    Jon
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  • Warpig883Warpig883 Member Posts: 6,459
    edited November -1
    Motorcycle/4 Wheeler carbs are a breeze. The CV carbs are mostly all that is used these days and have only a few more parts due to an enrichner circuit instead of a choke valve and the vacuum diaphram which moves the slide.

    You will need: the float level measurements and where it is measured from for your specific model, new float needle, new gaskets. Those are pretty much the only replaceable parts unless you have a hole in the CV diaphram or a model with an accelerator pump. You will also need some common tools, an air compressor and some carb cleaner. The pilot jet passage will be the hardest to clean but carb cleaner and the compressed air will take care of that. You will not need to buy jets unless you are rejetting due to modifications or you damage a jet.

    I rebuild and rejet for friends and neighbors as a hobby. I used to do a lot of Carter and Holley carbs for hotrods and other cars- I have a Quadrajet apart on the bench right now. I now end up doing a lot of motorcycles. Seems like everyone is fixing up the old bikes due to gas prices. The bad part is carb parts are getting expensive. I have been buying motorcycle carb kits on the internet with good luck they are much cheaper than the dealer.
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