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Thread: WOW, my HMF rips!

  1. 12-26-2002, 05:11 PM #1
    deepcj7
    deepcj7 is offline Senior Member
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    WOW, my HMF rips!

    Just installed my HMF slip on today, what a freakin difference. I held out for 2 years not to upgrade my exhaust so I can keep riding the track at my house without disturbing neghbors. Now I'm wondering why I didn't do it sooner.
    Now for a quick jetting question, my 400 pulls hard in all ranges, the only place I can see where I need to go richer is in the pilot jet( it pops on deceleration). Or will the low speed screw in the float bowl work for me? Would you guys still go richer on the main jet even though it's running fine, maybe like a 155? thanks for your help, sorry so long.:square
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  2. 12-26-2002, 06:08 PM #2
    Guest
    I wouldn't change the main if it is working good...what is your fuel screw set at now?
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  3. 12-26-2002, 06:21 PM #3
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    honda400exrider
    honda400exrider is offline Senior Member
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    im not sure about the jetting question, but do u have ne pics?
    Yellow 2001 400ex with the normal goods
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  4. 12-26-2002, 06:29 PM #4
    MR. HONDA EX'S
    MR. HONDA EX'S is offline Senior Member
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    The HMF is a great pipe! I would just play with the air/fuel screw.
    2000 400ex

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    2000 Red Dodge Ram sport
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  5. 12-26-2002, 06:38 PM #5
    Kadafiy
    Kadafiy is offline Senior Member
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    The hmf is awesome!!! Here is a pic of mine it's dirty, but getting hiper coated now so it'll look blingin when it gets back.
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  6. 12-26-2002, 06:44 PM #6
    joeroadking
    joeroadking is offline 250r rider for life!!!
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    I disagree adjusting the air fuel screw will help but to get the most gain you must rejet, a motor is just a big air pump the more air it flows (adding exhaust) the more fuel it needs in the same ratio as the air flow!to run at its potential, the most hp gain will be felt when jetting is richened
    Last edited by joeroadking; 12-26-2002 at 06:47 PM.
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  7. 12-26-2002, 06:59 PM #7
    BKVIEW4U
    BKVIEW4U is offline Senior Member
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    as i said n another post about 1 minute ago. get a 42 pilot jet . it makes a difference
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  8. 12-29-2002, 12:15 AM #8
    deepcj7
    deepcj7 is offline Senior Member
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    I will def get a 42 pilot, what series do I need 21 or 22? I will post a pic as soon as I get my dig. cam back from work. Thanks guys.
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