Can an airbox mod make you run too lean?
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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; Hi I'm new to the Forum I'm hoping to pick up a Grom this weekend I was talking to the dealer and he said that ...

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

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    Question Can an airbox mod make you run too lean?

    Hi I'm new to the Forum I'm hoping to pick up a Grom this weekend I was talking to the dealer and he said that he has had 3 come back with blown heads from running too lean from people modifying the airbox so they have to check for tampering and it voids the warranty if any bolt is removed. That worries me because one of the first things I was planning on doing was modding the airbox, also I was thinking about a Two Brothers S1R exhaust for it. Would this lean it out too much and should I get an EFI controller of any sort? I'm new to tuning and motorcycles in general I'm hoping to make this my first and enjoy it. Thanks in advance guys.

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    Wildhorse1966's Avatar
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    sounds like someone is blowing smoke up your arse .. the ecu will compensate for it

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    That's what I was thinking just unhook the battery for a few minutes and that will reset it right? I think the guy I was talking to had something against Groms he was saying he "didnt understand why there was such a cult following and why people try to make them sport bikes, if they want sport bikes they should buy a bigger sports bike."

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    Strokd_GE's Avatar
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    I've yet to hear of one pop with an intake and exhaust let alone just the intake

    Also what is a "blown head" ?

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    Thanks, that is reassuring, another novice question here but would there be any gains speed wise from those two minor mods?

    and I'm not sure that is how he worded it, I just kinda assumed he meant the cylinder head.

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    I did uni filter on throttle body and full yosh exhaust. Mine def ran very lean.so i bought ejk tuner and fixed the problem.

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    How do you know if it is running lean?


    Sent from my iPhone using HondaGrom.net

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    Spark plug sir. Not my first rodeo.

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    Its was pretty white the prong itself was the whitest

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    spark plug color tell a lot on what your engine is doing or not doing.

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