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Thread: Operating temperature?

  1. #16
    Join Date
    28th August 2005 - 19:37
    Bike
    MT09 Tracer
    Location
    New Plymouth Taranaki
    Posts
    1,552

    Temp

    Water boils about 4 deg F higher for every 1 pound pressure in the radiator.
    Hence as a motor works most efficiently the hotter it is without boiling, as soon as you loose pressure it boils straight away. The golden rule of "Never undo the pressure cap while the motor is hot" is due to this. If you want to cool the motor just leave it idling & pour cold water over the radiator (not under pressure) for a few minutes & the cooled down water in the radiator will have circulated thru the motor enought to have an effect.If you are confident it has cooled down enough you can then check the water level if there is none left in the catch can. Failure to wait untill it has cooled down enough can cause boiling & result in a cracked head or worse!
    I'm running a product called 'Water Wetter' supercoolant from Red Line (1 ounce per quart) with 50-50 Glycol mix.
    This a product commonly used in racing (especially turbo'd motors) without the glycol for an up to 40% reduction in operating temperature but needs the glycol on the street for it's anti corrosive / antifreeze properties.
    Suck, Squeeze, Bang, Blow aren’t just the 4 cycles of an engine

  2. #17
    Join Date
    17th February 2005 - 11:36
    Bike
    Bikes!
    Location
    Christchurch
    Posts
    9,649
    To the OP, sounds like your old bike had the thermostat stuck open, as that's an awfully low running temp for a four stroke motor.

  3. #18
    Join Date
    7th September 2004 - 10:00
    Bike
    A Krappisaki Tractor
    Location
    South
    Posts
    941
    Quote Originally Posted by Toast
    Just one thing worried me today though. It runs very hot. My previous long-term mount was an '02 6R, which generally ran at about 67-69 degrees at anything above 60km/h cruising, or have a good open road blast.

    The 929 seems to settle at about 82-84 though, which seems a touch hot after my last bike. It went over 100 quite a few times too, like when traffic was backed up 10kms leading in to Taupo.

    Is this normaly for 'Blades? Hondas? I remember that my CBR250R ran pretty hot.
    60ish sounds like an oil temp rather than water (unless yams run cold at the radiator). 84 sounds like a water temp tho - that sounds to me like its in the ballpark. Check the manual and see what it says.
    The contents of this post are my opinion and may not be subjected to any form of reality
    It means I'm not an authority or a teacher, and may not have any experience so take things with a pinch of salt (a.k.a bullshit) rather than fact

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