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XR70 Carb adjustment

This is a discussion on XR70 Carb adjustment within the Honda CRF70 forums, part of the General Talk category; I just bought my girlfriend a 70 for an early christmas present, but it runs like crap. Anywhere past a quarter throttle and it sputters ...

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  1. #1
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    jeepincreep89's Avatar

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    XR70 Carb adjustment

    I just bought my girlfriend a 70 for an early christmas present, but it runs like crap. Anywhere past a quarter throttle and it sputters and wont idle when you want it too. I cleaned the carb out well and put new (89 octane) gas in it. Could this possibly be a carb problem? I noticed theres an idle adjustment and mixture screw. Any instructions?



    Thanks for any info!


  2. #2
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    doopsx3's Avatar

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    Re: XR70 Carb adjustment

    screw the air adjustment all the way in and then back it out 1/4-1 full turn....somewhere in there is where it should be...adjust the needle on the slide if need be....if still runs like crap, your pilot circuit is still clogged.......also check plug gap too

  3. #3
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    PTECH's Avatar

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    Re: XR70 Carb adjustment

    Mine was the same way when I bought it. I tried cleaning the carb like 5 times, flushed the gas tank, changed the fuel filter, put a fresh plug in, bought a uni filter and messed with the screws for days. I had to buy a new pilot jet in order for mine to run right. It went from running like crap to running tits with just that.

  4. #4
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    jeepincreep89's Avatar

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    Re: XR70 Carb adjustment

    I guess Ill buy a new jet and than adjust the screws accordingly. Thanks for the help!

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