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Thread: Jetting Chart.

  1. #1
    Join Date
    Jan 2009
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    pittsburgh
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    Jetting Chart.

    i have an idea for the next sticky.

    we all should build a jetting chart for the 250r that will help guys make jetting changes as they modify their engines based on region and such.

    we would have to get it based on the stock engine and make the setups for several carbs and the progression of many different modifications.

    i know this sounds like a challenging task but it would be a great thread.

    if alot of us contribute it will not be that hard.

    PLEASE GIVE SUGGESTIONS ON HOW TO GET STARTED.
    If you can't modify it why have it???

  2. #2
    Join Date
    Dec 2008
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    OR
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    Why ?
    its easy just call or email sudco, tell them what carb you have and what is done to your motor and they will give spot on jetting.
    works every time
    Full coustom 1988 trx 250r W/CPI sphinx LED 310 PV,fullbore,laeiger works suspension,the list goes on and on
    2009 trx250r pro-cross 310, laeiger a arms and swinger,pep suspension by jet racing,shiney and anodized
    1986 trx250r woods build in progress
    2005 trx450r -sold-
    2007 yfz450 -sold-
    2008 trx450r -sold-
    2007 ltr450 -sold-
    why did I sell the 4 pokes you ask? ride a 60hp trx 250r in the dunes that weighs 100 lbs less and ask again.
    2005 400ex wifes woods bike, fcr,white brothers full pipe,a few other mods,pep suspension by jet, gt thunder rear link
    2004 crf 250r set up for woods
    2006 rmz450 set up for sand

  3. #3
    Join Date
    Jan 2009
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    pittsburgh
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    2,950
    Originally posted by jhtrx250r
    Why ?
    its easy just call or email sudco, tell them what carb you have and what is done to your motor and they will give spot on jetting.
    works every time
    if so, there would be alot less jetting threads on here. guys get the ESR kits and they can't even get the jetting spot on for them.
    If you can't modify it why have it???

  4. #4
    Join Date
    Sep 2008
    Location
    Vermont
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    601
    people could post their setups in a format like something like

    displacement
    stock/stroker crank
    headwork/porting/reeds
    pipe
    stock / aftermarket ignition

    carb model / size
    mainjet / pilot / needle clip / screw setting

    maybe throw in drive sprockets?

    I know this would help out a lot of people. z400central does something like this

  5. #5
    Join Date
    Jul 2003
    Location
    The Bench Marked "Group W"
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    722
    You'll also need riding altitude and the season you're jetted for.

    Originally posted by jhtrx250r
    Why ?
    its easy just call or email sudco, tell them what carb you have and what is done to your motor and they will give spot on jetting.
    works every time
    I disagree. The "Pre-jetted" carb I got was jetted so rich it wasn't funny.
    SilverFox pee'd on my quad, true story.


    "He fears his fate too much, or his deserves are small, he who will not put it to the test to win, or lose it all"

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