Are my temps Ok?
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  1. #1

    Member #
    37025
    Bike(s)
    Recent 1998 carbie. Just a 2001 Fi now.
    Join Date
    Jan 29 2019
    Location
    Sevenoaks, Kent, UK
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    Are my temps Ok?

    Hi,

    First of all I'm sorry if this has been covered somewhere. I have looked, but can't find any definitive previous answers, so here I am.

    During winter and spring my 2001 Fi 'Bird constantly runs in the low 80's. On a warm spring day she would run up to perhaps 100 if idling, and the fan would kick in. Never went any higher than maybe 101.

    Now, however (my first summer with a 'Bird) she is constantly running in the low 100's unless I can maintain at least 50 - 55 mph. And then I can keep her down to maybe 95. If I get stuck in traffic it's up to 107 so far. Fan always kicks in at 100, but doesn't seem to make a lot of difference.

    There is no coolant leakage, and the reserve tank is up to it's "max" level.

    I guess that properly mixed coolant doesn't boil at 100 degrees like water, but are these temperatures within normal acceptable limits?

    I know about the Ebay alloy replacement (pain in the arse, didn't fit!) as I put one on my 1998 carbie, but don't want to go spending money (and time) if I don't need to.

    I can really feel the heat under my right knee and I just need a bit of reassurance!!

    Cheers,

    Louie

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  3. #2

    Member #
    15380
    Bike(s)
    2001 cbr1100xx, 2000 klr650, 1998 e430, 1971 914
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    Jan 10 2013
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    san jose, california
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    Re: Are my temps Ok?

    had to convert but, i see 107c = 224.6f.

    highest i've seen is 238f! (114.4c). i've read the computer will shut the bike off at some point, forget if its 240 or 250f...

    lots of threads on the subject, from all i've read, we're within normal.

  4. #3

    Member #
    20884
    Bike(s)
    2000 Bird - 2 RSV Milles - CBR600RR
    Join Date
    Nov 06 2015
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    Re: Are my temps Ok?

    Louie, just fit an inline manual override switch. Turn them on when needed or you are expecting heavy traffic etc. In our recent spell of hot weather i turn them on as the needle starts to creep up, twin 5.25" fans soon drag it down.
    carpe diem

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  6. #4

    Member #
    37025
    Bike(s)
    Recent 1998 carbie. Just a 2001 Fi now.
    Join Date
    Jan 29 2019
    Location
    Sevenoaks, Kent, UK
    Posts
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    3 times

    Re: Are my temps Ok?

    Thanks! I was getting pretty worried!

  7. #5

    Member #
    37025
    Bike(s)
    Recent 1998 carbie. Just a 2001 Fi now.
    Join Date
    Jan 29 2019
    Location
    Sevenoaks, Kent, UK
    Posts
    34
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    3 times

    Re: Are my temps Ok?

    The override switch would be pretty simple, but the fan doesn't seem to make a lot of difference! Are the twin 5.25's a sensible option? Quite happy to fit them if it'll help!

  8. #6

    Member #
    462
    Bike(s)
    99 CBRXX
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    Nov 27 2006
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    Thailand
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    Re: Are my temps Ok?

    Quote Originally Posted by Louie7oaks View Post
    The override switch would be pretty simple, but the fan doesn't seem to make a lot of difference! Are the twin 5.25's a sensible option? Quite happy to fit them if it'll help!

    the fan works - trust me

    mine stopped due to wiring connector in heavy traffic and temp and before I could pull over and shut down while sitting on a red light a radiator hose exploded and blew the side fairing off

  9. #7

    Member #
    20884
    Bike(s)
    2000 Bird - 2 RSV Milles - CBR600RR
    Join Date
    Nov 06 2015
    Location
    Worcester UK
    Posts
    3,076
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    Re: Are my temps Ok?

    Quote Originally Posted by Louie7oaks View Post
    The override switch would be pretty simple, but the fan doesn't seem to make a lot of difference! Are the twin 5.25's a sensible option? Quite happy to fit them if it'll help!
    Twin fans do make a big difference, hardest part is finding ones with a low profile. Spals fit ok. Before going to all that trouble i would check your rad is not blocked inside and out. Is the fan spinning at the correct speed? Best way to clean the rad externally is to remove it, soak it underwater overnight and then put it in the dishwasher. . Be careful using a pressure washer on it though, hose pipes ok but only flush from the fan side.

    Edit, also noticed a difference when i had the Akra system ceramic coated from headers to end can.
    carpe diem

  10. #8

    Member #
    37265
    Bike(s)
    017 1290SDGT & 05 CBR1100XX
    Join Date
    Mar 21 2019
    Location
    Brisbane, Australia
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    Re: Are my temps Ok?

    Cheers all,

    My BB (05) runs at 84C when on the highways at 100kph.... the close fitting fairing is a well known cause of higher temps at slow traffic speeds (low airflow) - mine gets to 107C in the slow suburban traffic islands/roundabouts/lights near home. The fans cut in around 100C and drag the temp down to 94C where they cut out. It's normal for the FI engine..... still very hot but so long as you have a proper coolant mix for your climate (I run with Honda's blue bottle premix 50/50 here in my part of the world - no snow - winter 5C, up to 40C in summer). Hasn't affected my engine life with 130,000kms, no oil consumption, regular oil and tune ups etc etc.



    PS One summer I was nearly finished a service/coolant change and decided to leave the fairing cowls off...... i rigged some zip ties to support the upper fairing-screen and rode it 'naked' ....... can't recall how much cooler it ran, but it was cooler - the down side was that the upper fairing-screen was reliant on clever zip tie support to minimize movement, so be careful if considering this option - you won't want to break any plastics and I haven't bothered to do this again anyway. The BB has become my garage ornament, no longer my main ride.


 

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