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Where should the Temerature gauge be? Mine doesen't move!?

Discussion in 'Yamaha 250cc In-Line 4's' started by FZRSHREDDER, Sep 10, 2009.

  1. FZRSHREDDER

    FZRSHREDDER New Member

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    Hi guys just a quick question, My temp gauge on FZR250 3LN-3 1990 never seems to move! <!-- s:shock: --><img src="{SMILIES_PATH}/icon_eek.gif" alt=":shock:" title="Shocked" /><!-- s:shock: -->
    I bought the bike off my older brother and he seemed to think it was normal. In the car I drive, it stays around the halfway mark and i see this as a sign it is ok to rev the engine a bit harder.

    So where should it be on the bike? I really dont think ive seen it come off the little white indicator on the bottom. So should i be checking for faulty parts?

    I just want to make sure im treating the engine nicely. <!-- s:wink: --><img src="{SMILIES_PATH}/icon_wink.gif" alt=":wink:" title="Wink" /><!-- s:wink: -->

    Thanks a lot and happy riding, <!-- s:) --><img src="{SMILIES_PATH}/icon_smile.gif" alt=":)" title="Smile" /><!-- s:) -->

    Jarrad.

    PS i tried doing lots of searches and only found people with temp gauges showing too much!
     
    FZRSHREDDER, Sep 10, 2009
    #1
  2. Amak

    Amak New Member

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    Not too sure about the bike mate, but I wouldn't really want my car's temp gauge sitting around the half way mark! Mine gets just above cold and stays there generally.
     
    Amak, Sep 10, 2009
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  3. Romantix1

    Romantix1 New Member

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    mm.... well mine is usually displaying 1/4 of the gauge. but sitting in traffic should make it run up close enough to red.

    Fan usually kicks in then and bike is usually turned off <!-- s:) --><img src="{SMILIES_PATH}/icon_smile.gif" alt=":)" title="Smile" /><!-- s:) -->

    It should definetely be displaying some kind of heat though lol
     
    Romantix1, Sep 10, 2009
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  4. glen5122

    glen5122 New Member

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    the pervious owner might have had overheating problems and removed the thermostat.

    does the fan kick in when it has been idiling for a while.(form cold can take quite some time)

    mine sits around 1/2 when running around sitting at lights and goes below 1/4 when riding at speed but i've never seen mine go over 3/4 the fan always kicks in and cools it off.
     
    glen5122, Sep 11, 2009
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  5. FZRSHREDDER

    FZRSHREDDER New Member

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    never seen the fan going but i will have a look to see if the thermostat is gone haha. what excactly would i be looking for visually? i know roughly where it would be but not sure what to look for <!-- s:???: --><img src="{SMILIES_PATH}/icon_confused.gif" alt=":???:" title="Confused" /><!-- s:???: -->

    Wouldnt running an engine constantly cold be very bad for the health of the engine? IE not getting to operating temperature.

    Thanks for your input guys ive made a pact with myself to get this badboy running really nicely again and all this help is really appreciated. <!-- s:wink: --><img src="{SMILIES_PATH}/icon_wink.gif" alt=":wink:" title="Wink" /><!-- s:wink: -->
     
    FZRSHREDDER, Sep 11, 2009
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  6. Amak

    Amak New Member

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    It doesn't run in the cold zone just above it as 'warm' meaning my cooling system is doing its job. But then again my car doesn't have a thermo fan so the fan spins all the time :p.
     
    Amak, Sep 11, 2009
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  7. FZRSHREDDER

    FZRSHREDDER New Member

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    Sorry, I mean I am worried that maybe my engine is not getting to operating temp if the thermostat is removed, but I really must go and find out if its still there! too busy atm, ill check it out tomorow in the sunlight.
     
    FZRSHREDDER, Sep 11, 2009
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  8. dave

    dave Well-Known Member

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    There are couple of posts that describe how to to check the temp sensor and gauge on this site. The temp should get up fairly high (or hot) if you just let it idle long enough..
     
    dave, Sep 12, 2009
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  9. HptK

    HptK New Member

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    Hi dave, Been a while hey?
    On some other forums i use they use the acromyn UTFSE. Use a SEARCH ENGINE to look it up.
    I went through this years ago. if the thermostat is "forked" you will not register a temp at all. My problem was the bloody mechanic i was using did not plug the thermostat wires back in after a service. Start there.
     
    HptK, Sep 12, 2009
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  10. FZRSHREDDER

    FZRSHREDDER New Member

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    Thanks mate will certainly give that a go haha. Did use the search function but not so good at it. sorry if ive annoyed anyone
     
    FZRSHREDDER, Sep 12, 2009
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  11. dave

    dave Well-Known Member

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    It has been a while Hayden, do you still have the FZR??? Think i did see the HptK banner on another forum a few weeks ago, so your still biking??.

    Found the other post:

    I would imagine at 120c 16ohms the gauge should be well in to the red and 100c not quite
    up to the red.
     
    dave, Sep 12, 2009
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  12. maxfacta

    maxfacta New Member

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    I never saw my temp gauge move whilst riding. I was concerned about it too, thought maybe it wasn't working. So I let the bike sit there idling for 5 ~ 10 minutes and only then did it start indicating a higher temp, and then the fan kicked in. Sweet!
     
    maxfacta, Sep 14, 2009
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  13. HptK

    HptK New Member

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    Im in a few forums dave, you might have seen me elsewhere! Yeah, still have the fzr, but I am about to pass it on to the missus and get myself an '09 R1 as soon as I can afford it.
     
    HptK, Sep 18, 2009
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  14. FZRSHREDDER

    FZRSHREDDER New Member

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    Ok sorry but I am finding it hard to understand where to take these readings from. I have a friend who is handy with the multimeter but i am unsure of what i'd ask him to do haha.
    Here is a picture of my thermostat housing, I cleaned the ground connection (it was quite oxidised) but just went for a ride and still not activity on the gauge other than a slight movement when ignition is turned on. Could I please be given a hint as to what components to remove or test or clean, thanks heaps![​IMG]
    By hairyhairy
     
    FZRSHREDDER, Sep 18, 2009
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  15. dave

    dave Well-Known Member

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    The fan switch has 2 wires in the plug. The temperature sensor only has one wire only.

    Remove the sensor and test in hot water as shown using a thermometer and a multimeter.
    You should get the resistance values indicated on the meter using the temperature values I indicated in the previous posts, although you wont get the water above 100degrees.
    50c = 154ohms
    80c = 47-57ohms
    100c = 26-29ohms
    120c = 16ohms
    [​IMG]


    To test the gauge, get some resistors from an electronics shop of the values indicated.
    Nearest values are 150, 52, 27 & 15 ohms with a 1 watt rating
    Disconnect the sensor and connect the resistors one at a time, connect one end to the plug and the other to metal earth of the bike to complete the circuit.

    In the following diagram the sensor is shown as a resistance at the bottom of the blue wire. The colours I used are for highlight only..
    [​IMG]
     
    dave, Sep 19, 2009
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  16. FZRSHREDDER

    FZRSHREDDER New Member

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    aaah ok cool i'll give that a go!

    Thanks very much dave your a champ
     
    FZRSHREDDER, Sep 19, 2009
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