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Float Heights Once-and-for-All

Discussion in 'Yamaha 250cc In-Line 4's' started by Dr Kevorkien, Oct 6, 2007.

  1. Dr Kevorkien

    Dr Kevorkien New Member

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    I've read so many posts on float heights.... most of them say that they should be set BELOW the indication line on the carbies.

    Problem for me is, it just does not seem possible for me to lower the floats down that much.

    The closest I can get is about 5mm above the line, and that's by bending the plastic floats themselves (holding them in front of a heater, bending them and letting them cool). The needles seem fine. Smooth and conical. Seats seem fine. They have no problems blocking off fuel, it's just that when I bend the tabs up that much my needles are already stopping the fuel flow before it starts.

    My bike is a 3LN model.

    Any ideas anyone?
     
  2. andrew1

    andrew1 New Member

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    fzr float hight

    Hi had the same problem found out of the forum that its 10.5 above the line where the fzr400 4.6 6.5 below so you will never get it below as you have found and if you do it will stave for fuel above 10,000rpm good luck [ <!-- s:) --><img src="{SMILIES_PATH}/icon_smile.gif" alt=":)" title="Smile" /><!-- s:) --> <!-- s:) --><img src="{SMILIES_PATH}/icon_smile.gif" alt=":)" title="Smile" /><!-- s:) --> [/url][/code]
     
  3. Dr Kevorkien

    Dr Kevorkien New Member

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    Thanks andrew. Been messing for ages with them. I've had the carbs appart, so tuning it should be a little easier now know the floats are ok..

    Mod if this is indeed corrrect can we have this info added to fzr specs page.

    ??is this the right way to get the attention of one of you God people up there in front of the computer screen looking down on us wee anties.... heeellooooo <!-- s:notworthy: --><img src="{SMILIES_PATH}/th_Not_worthy.gif" alt=":notworthy:" title="not worthy" /><!-- s:notworthy: -->
     
  4. koma

    koma New Member

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    *boomy voice from clouds*
    You have my attention.
    */boomy voice from clouds*

    I'll hold off on that until perhaps someone else can confirm this info is correct as i haven't had my head inside an FZR250 for quite some time now.
     
  5. FZR Dude

    FZR Dude New Member

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    *squeaky voice from the side*
    I'm listening....
    /*squeaky voice from the side*

    The only FZR250's I've seen in person, were about 20 years ago, from about 30 feet a way, at a racetrack, and they were in motion.......

    <!-- s:oops: --><img src="{SMILIES_PATH}/icon_redface.gif" alt=":oops:" title="Embarassed" /><!-- s:oops: -->
     
  6. Dr Kevorkien

    Dr Kevorkien New Member

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    * Darth Vader Vocal SFX *
    as always you are wise my lord. I have something-something-something DARK SIDE, something-something-something COMPLETED the modifications to the machine.
    /* Darth Vader Vocal SFX *
    <!-- s:Starwars: --><img src="{SMILIES_PATH}/th_Starwars.gif" alt=":Starwars:" title="starwars" /><!-- s:Starwars: -->
    All hail The Family Guy.

    PS to Squeaky On The Side: So you didn't catch sight of those heights then i take it.
     
  7. FZR Dude

    FZR Dude New Member

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    <!-- s:roll: --><img src="{SMILIES_PATH}/icon_roll.gif" alt=":roll:" title="Rolling LoL" /><!-- s:roll: -->

    :squeakin
    I looked really hard. Honest. But they was just tooooo fast.
    /:squeaker
     
  8. Aaron1

    Aaron1 New Member

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    hey its been years since this tread has been brought up again.. has anyone come up with a definite answer to this
    for the 3ln 250

    thanks
     
  9. sylvaner01

    sylvaner01 Member

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    FZR250 3LN3 1991 Blue/white
    funny I stumbled across this, I will confirm soon =D
     
  10. dave

    dave Well-Known Member

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    This is accurate as far as I know.

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