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Can an airbox mod make you run too lean?

This is a discussion on Can an airbox mod make you run too lean? within the Grom Talk forums, part of the Honda Grom Forums category; my bike has a air box mod, and 2 brothers exhaust...it runs great. I love it sooo much better. Its actually easier for me to ...

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Thread: Can an airbox mod make you run too lean?

  1. #21
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    my bike has a air box mod, and 2 brothers exhaust...it runs great. I love it sooo much better. Its actually easier for me to drive now.

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    Mine just doesn't feel right. I don't know what it is. Could be the valves, but it sounds fine. Could be the spark plug. Could be something to do with the air box mod. Maybe I am just paranoid. I wish someone near me with a Grom would come ride mine and compare it to his/hers to see if there is any difference or not.

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    Is it your first bike or are you comparing it to others?

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    Quote Originally Posted by Top Gromen View Post
    Is it your first bike or are you comparing it to others?
    Both.

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    Quote Originally Posted by dlakerguy View Post
    Both.
    Recheck all your fittings to make sure they are seated properly, do a reset of the ECU and you should be good to go.

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    My Spark Plug

    I just checked my plug at 600km (375miles) does this look good? or is it lean? bike is all stock...
    Attached Thumbnails Attached Thumbnails Can an airbox mod make you run too lean?-sp2.png   Can an airbox mod make you run too lean?-sp.png  
    ***********************
    1988 Honda ZB50
    1988 Honda ZB50 (Custom)
    2014 Honda Grom

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    Quote Originally Posted by YYZGROM View Post
    I just checked my plug at 600km (375miles) does this look good? or is it lean? bike is all stock...
    Looks new to me, if there is white ash and you can touch it on the tip of the plug and it has a feeling of burnt ash like in a fire place than it is lean but from those photos looks normal to me or close to the lean side.

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    My plug is white also with little ash on it. Even after 2 resets.
    Free airbox mod and MNNTHBX exhaust are my only mods.
    What would be a quick fix for this? PCX 150 injector? Colder plug?
    2014 Black Grom,
    Mods in 2016:
    MNNTHBX Low mount Exhaust, MNNTHBX high plate mount fender eliminator (custom brakets for the turn signals, bar end mirrors.

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    It's the normal lean mapping of the stock ecu. Fuel controller would be the best option. EFIE chip will be the cheaper option that works well too.
    turpinator and Scoobs like this.

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    Well looks like Bazzaz or PCV it is
    2014 Black Grom,
    Mods in 2016:
    MNNTHBX Low mount Exhaust, MNNTHBX high plate mount fender eliminator (custom brakets for the turn signals, bar end mirrors.

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