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Open Headers

Discussion in 'XJ Technical Chat' started by Crughes, Feb 21, 2009.

  1. Crughes

    Crughes New Member

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    I'm working on modding my xj650. Considering running open headers. Was wondering what kind of adjustments, if any, I need to make. Carbs, breathers, etc.

    Thanks
     
    Crughes, Feb 21, 2009
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  2. schooter

    schooter Active Member

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    thow some pods on and you'll be fine.... just kidding, you may,/ will probably need to put some larger jets in your carbs.... and you may want to have a steady supply of valves on hand....
     
    schooter, Feb 21, 2009
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  3. Tiny

    Tiny Member

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    If you were planning on changing to pods you might as well do it all at once since you will need to rejet anyways.
     
    Tiny, Feb 21, 2009
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  4. Zookie400

    Zookie400 Active Member

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    straight pipes are "weapons of mass destruction" loud. tried it, my ears bled, and never again will i go back.

    a definite re-jet will be in order.
     
    Zookie400, Feb 21, 2009
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  5. joshwxj

    joshwxj Member

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    i ran open headers on my 550 seca for about 2 years. you will need to go to stage three jets ($115) as stage 2 jets ($110) are for modified or after market pipes. as well as a k&n air filter ($50) or pods. this way you get enough air and fuel going in as coming out. i loved the sound of mine without mufflers. its a great deep throaty sound down low and it screams like a banshee when getting close to 8k rpm
     
    joshwxj, Feb 21, 2009
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  6. Crughes

    Crughes New Member

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    Where do you suggest to go. I found a dynojet stage 3 for a 550 will that work just as well. Or should I just check ebay or something. Been looking for parts for this bike without much luck. Any suggestions where to order from? Thanks for the quick replies
     
    Crughes, Feb 21, 2009
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  7. dwcopple

    dwcopple Active Member

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    why is this in the FAQ? And NO you will not burn up your valves. That is quite a myth. Just use common sense and know how to jet a carb properly and you'll be fine.
     
    dwcopple, Feb 21, 2009
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  8. joshwxj

    joshwxj Member

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    this is where i went to get mine. take a look around at the website, they have a lot of stuff. the best part about these guys is they have email support as well as phone support (which i used). great product at a reasonable price and very good instructions. good luck


    http://www.jcmotors.com/pc-3401-1161-dy ... 81-82.aspx
     
    joshwxj, Feb 22, 2009
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  9. dqnjuan

    dqnjuan Member

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    def wrong forum, but...


    I have open headers and just rejetted larger with jets from chacal without all the kit work lot cheaper if you be patient with trial and error.


    Im also a fan of the "lollipop" home made baffles, thier kinda tunable and def add a lil back pressure and velocity to the open headers. It also gives it a slightly different sound that I like.
     
    dqnjuan, Feb 22, 2009
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  10. schooter

    schooter Active Member

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    what are lollipop baffles and hwo do u get them? or make them?
     
    schooter, Feb 22, 2009
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  11. Crughes

    Crughes New Member

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    sorry for posting here, I saw suggestions and went there. haha. I realize where I should have put it now. Thanks for the feedback
     
    Crughes, Feb 22, 2009
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  12. dwcopple

    dwcopple Active Member

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    they are bolts with washers welded on the ends to make the exhaust diameter smaller. you can slant them in the pipe to for modified flow.
     
    dwcopple, Feb 22, 2009
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