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Thread: ATC250R fuel mixture

  1. #1
    Join Date
    Feb 2003
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    ATC250R fuel mixture

    :?: Hi everyone. I am new the site and had a question. I bought a running 83 ATC 250R the other day and I am not really sure of how to mix the gas and oil, also what kind of oil is recommended. Any help is appreciated. Thanks.......Tim
    1983 200x, 1983 250r, 1982 200e., 1982 Dodge 4X4 Power Ram stepside-truck IS For Sale, ..........Nuttin' like a HONDA , I've got HONDA fever........Do you???

  2. #2
    kimmer250r's Avatar
    kimmer250r is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    Mix the gas and oil in a 5 gallon gas can. Stock ratio is 20:1 for the honda 250r, but most people run 32:1 with synthetic oil. I perfer Blue Marble oil over anything on the market for 2 cycles. It is a little costly, but it does everything they claim! I know, because I use the stuff and it is awsome! I gained 300 rpm's on my 02 ZR600 snowmobile after 1 hours use of this stuff. It is amazing. Check out the articles about it at www.nulubes.com.
    THERE FROM THE START-HASPIN VET 2002-2003-2004-2005-2006-2007-(missed 08-dang babies)-2009-2010-2011-2012-2013 AND ALL THE REST!

    1985 Big Red
    198? Kawasaki KLT 250
    19?? ATC70
    "Secret Project" Tiny Titan
    2010 Polaris Crew

  3. #3
    atc86r is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    get an oil that has one mixture recommendation. some cheap oils will give you a chart on different ratios. i use amsoil at 80:1.
    I want a race honda with reverse.

  4. #4
    kimmer250r's Avatar
    kimmer250r is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    The multiple mixture charts are to help you tell how much oil you need to put in per gallon to meet your manufactures specifications, it's not because it is cheap oil. I am an amsoil dealer and if you are running that amsoil at 80:1, then you are asking for a meltdown. You DO NOT mix to what the oil says on the bottle, you mix to the manufactures recommendations. Just because amsoil says 100:1 or injection, it doesn't mean you can put 100:1 in everything that uses mix gas. Honda says 20:1 so go with that. Most people go with 32:1 for less fouling.
    THERE FROM THE START-HASPIN VET 2002-2003-2004-2005-2006-2007-(missed 08-dang babies)-2009-2010-2011-2012-2013 AND ALL THE REST!

    1985 Big Red
    198? Kawasaki KLT 250
    19?? ATC70
    "Secret Project" Tiny Titan
    2010 Polaris Crew

  5. #5
    atc86r is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    thats pretty funny kimmer.
    I want a race honda with reverse.

  6. #6
    kimmer250r's Avatar
    kimmer250r is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    Whats so funny about it? It's the truth. I can bring up about 6 different motors that I have seen seized from not running enough oil in the mix.
    THERE FROM THE START-HASPIN VET 2002-2003-2004-2005-2006-2007-(missed 08-dang babies)-2009-2010-2011-2012-2013 AND ALL THE REST!

    1985 Big Red
    198? Kawasaki KLT 250
    19?? ATC70
    "Secret Project" Tiny Titan
    2010 Polaris Crew

  7. #7
    atc86r is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    jetting.
    I want a race honda with reverse.

  8. #8
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    32:1? That would translate into how many ounces of oil to a gallon of gas? May be a stupid question, but I am not really knowledgeable about this type of thing. Thanks
    1983 200x, 1983 250r, 1982 200e., 1982 Dodge 4X4 Power Ram stepside-truck IS For Sale, ..........Nuttin' like a HONDA , I've got HONDA fever........Do you???

  9. #9
    Join Date
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    Four oz. to the gal for 32:1. There are several ratio measuring devices. The one I have shows what line to fill to per gallon. And there are several different ratios on the container. This makes it easier if you are trying different ratios to see which works best. These measurers should be sold at any bike shops.
    Trikes: Cagiva 200, 85? Tiger 250,(2)84 200x's , (3)86 200x's, 87 200x, (5)85 350x's, (2)86 350x's, (2)85 250r's, 86 Tecate, (3) 85 250sx's Restoring: 83 200x, 86 250sx. Too many utility trikes to list.

  10. #10
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    Dec 2002
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    32:1, for example, means 32 parts of gas to 1 part of oil. to find out how much oil (in ounces) you should use for one gallon of gas for a particular ratio (20:1,32:1,40:1,etc.), divide the first number (20,32,40,etc) by 128. 20:1 is 6.4oz. 32:1 is 4oz. 40:1 is 3.2oz.

    also remember that when you make the gas/oil mixture richer (20:1 instead of 40:1), that makes the air/fuel mixture going through the carb's jets leaner.

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