Coolant Level??confused

Discussion in 'Technical Help' started by Panagiotis, Jun 8, 2025.

  1. Panagiotis

    Panagiotis New Member

    Jun 8, 2025
    8
    3
    Greece
    When do we check the level of the coolant?
    When it's cold or hot??
    Mine when I fill it up cold to the max of the reservoir and I go few times for a run it miss it and its starts to loose coolant.
    I dont have any leaks and my oil is clean.
    Now it's at min level and when the bike is warm it gets between max and min.
    This is confusing and I don't know what is happening and what is the right thing to do.
    I have changed the coolant with motul motocool the red one and I have done almost 3000 km.
    Any advice will be helpful
    Thanks
     
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  2. Panagiotis

    Panagiotis New Member

    Jun 8, 2025
    8
    3
    Greece
    My bike is a 2008 street triple 675
     
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  3. sprintdave

    sprintdave Nurse, think it's time for his medications.
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    May 25, 2014
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    I assume you don't mean at the radiator but the tank under the seat (on my bike anyway). This is an overflow tank and it will find it's own level. As long as you have no leaks or problem with the bike don't worry about it. My speed triple is fine with the level way down the tank.
     
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  4. Panagiotis

    Panagiotis New Member

    Jun 8, 2025
    8
    3
    Greece
    Yes about the tank I mean.
    Thanks you for your help!!
     
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  5. TRIPLE X

    TRIPLE X Senior Member

    Sep 1, 2021
    602
    243
    Norfolk
    Check it when cold. If you fill to the max Triumphs don't seem to like it and usually spit out coolant when hot until it finds its own level. As long as it is not below min then everything is fine. When I do a coolant change I fill halfway between max and min.
     
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  6. Panagiotis

    Panagiotis New Member

    Jun 8, 2025
    8
    3
    Greece
    Now when it's cold is at min level.
    I will leave it there and I will check it
    Thanks
     
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  7. joe mc donald

    Subscriber

    Dec 26, 2014
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    Cold
     
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  8. Richard Pennycuick

    Richard Pennycuick New Member

    Aug 10, 2025
    1
    1
    edinburgh
    my coolant line is below min and it was only serviced 3 months ago, is this normal
    2023 765 rs

    How do you get the rad cap off its really stiff
     
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  9. sprintdave

    sprintdave Nurse, think it's time for his medications.
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    May 25, 2014
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    Keep an eye on it but you may find that the bike has found its own level, speed triples regularly run well below minimum
    Have you tried pressing down as you turn the cap anticlockwise?
     
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  10. joe mc donald

    Subscriber

    Dec 26, 2014
    15,247
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    @Richard Pennycuick Those caps can be tricky sometimes. Just keep pressing it down and twisting it will come eventually. Never attempt when the bike has been running. And if worried take the over flow tube from the rad neck and just force a little water down it. If you don't know what coolant just use deionised water don it.
     
  11. TRIPLE X

    TRIPLE X Senior Member

    Sep 1, 2021
    602
    243
    Norfolk
    I don't think it's the case now but some caps used to have a tiny grub screw for security. Worth checking first.
     
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