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Throttle response laggy? How to fix?

Discussion in 'FZR250.com - Archives' started by Step, Aug 12, 2004.

  1. Step

    Step New Member

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    After borrowing my friends CBR250 I noticed how sluggish my throttle responds compared to his bike.

    This just a case of needing tune up?

    Specifically what?

    Thanks,
    Step
     
    Step, Aug 12, 2004
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  2. Dean

    Dean Active Member

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    I felt my throttle sluggish when i placed mobile preiumn in there.. i moved back to caltex vortex and my bike was back to normal.. so maybe the fuel. easiest thing to check first.
     
    Dean, Aug 12, 2004
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  3. Boz

    Boz New Member

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    And if it isn't the fuel, you could need to tune carbies, clean / replace air filter, ... pretty much anything that could impact fuel/air mixing and igniting.

    So could be many things... but start with the fuel and then move onto tuning.
     
    Boz, Aug 13, 2004
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  4. Step

    Step New Member

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    Thanks

    Tried different fuels.. seem to get best performance with BP Ultimate.

    Plan on changing the fuel filter today..

    Anyone know where I can find a 2KR air filter?
     
    Step, Aug 19, 2004
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  5. Step

    Step New Member

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    Changed airfilter today. Got a nice UniFilter washable one. Seeing all shops I spoke to didnt stock original thought I mayaswell get the performance one that I can wash.

    Its made a bloody nice difference!

    Really notice it down low... seems to have bit more torque.. runs smoother and generally a lot happier. I can see my fuel efficiency improving alot now as its happy to put along at alot lower revs than before.

    Next on list is fuel filter. Had a good look today and it looks quite dirty.. appears to have blackish shadows inside it when light on it.

    Thanks,
    Step
     
    Step, Aug 19, 2004
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  6. Step

    Step New Member

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    Changed fuel filter the other day..

    Jeebus it was dirty. Element was almost black, and chunks of crap all inside it.

    Of course shop didnt have replacement one, so I had to use a VFR 750 filter. Exactly the same apart from the inlet/outlet diameter sizes were a little bigger.

    Very pleased with the results from these two easy changes <!-- s:o --><img src="{SMILIES_PATH}/icon_surprised.gif" alt=":o" title="Surprised" /><!-- s:o -->
     
    Step, Aug 23, 2004
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  7. greeny

    greeny New Member

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    hey Step, how much was the unifilter, do you have a part number?
    also for the fuel filter? did the different sized outlets on the fuel filter cause you any dramas?
     
    greeny, Sep 1, 2004
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  8. Step

    Step New Member

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    $60 or something. I got direct from them in Hornsby

    <!-- m --><a class="postlink" href="http://www.unifilter.com.au/make_bike_road.asp?make=YAMAHA">http://www.unifilter.com.au/make_bike_r ... ake=YAMAHA</a><!-- m -->

    Mine was the top one.. 2KR. I assume the other would be 3LN.

    YAMAHA FZR 250 88/90 NU 2296
    YAMAHA FZR 250 91/98 UF300 190

    The different size pipes on the fuel filter wasnt much trouble. Just had to push a little harder to get fuel line back on.
     
    Step, Sep 3, 2004
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