Radiator guards and cooling.
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  1. #1
    Senior Member tucksie's Avatar
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    Radiator guards and cooling.

    Hello All,
    Anyone have a view or an opinion on the effect of a rad guard on cooling? Some of the guards seem to block a good percentage of the radiator and does this affect cooling, particularly in higher temperatures? Also, are mesh type guards more efficient?
    Thanks
    Last edited by tucksie; 07-25-2019 at 10:08 AM.

  2. #2
    Senior Member COLVERT's Avatar
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    In ten years on the forum I have never seen a post by anyone saying their rad guard had made their engine overheat.

    As for a guards efficiency I guess that depends on the size of the holes and what they might let through.

  3. #3
    Senior Member tucksie's Avatar
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    Not so much overheat but run hotter than normal, noticeably so in very warm weather. It could be a consideration between protecting the radiator and accepting higher engine temps perhaps?

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    Senior Member tucksie's Avatar
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    The Evotech guard looks efficient but ive been unable to locate a similar guard for the earlier CB, without making permanent alterations to the bike.

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    Senior Member leedsrhino15's Avatar
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    I have a guard on mine like the one in the NC700 pic. Its been on pretty much since I got it in 2012 and I really cant remember if it runs hotter. Its run fine all the time in any weather even in this hot spell or when I've been to Europe on it. Its worth it to stop stones getting in there. Mines a Beowulf one

  7. #6
    Senior Member tucksie's Avatar
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    A guard is definitely worth the peace of mind for me regarding possible damage. However, i’ve been more aware in the recent very warm weather how the engine temp soon climbs and it got me thinking more about how a guard might be affecting the cooling.

  8. #7
    Senior Member BigOne-94-14's Avatar
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    Quote Originally Posted by oldcorollas View Post
    What does the engine temp climb to? >110C?
    I've seen 238f on my old CB1000R, and I had no aftermarket guard, just the factory plastic one.


    I've never cared to look on the NSC,though I do have the EvoTech guard. It hasn't been that warm here (relatively) this year. No 110f yet, so who cares? LOL

  9. #8
    Senior Member tucksie's Avatar
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    Quote Originally Posted by oldcorollas View Post
    What does the engine temp climb to? >110C?
    The engine temp briefly read 106c, which is the highest i can remember seeing in the time i’ve owned the bike (5 years approx.).
    Last edited by tucksie; 07-27-2019 at 02:01 AM.

  10. #9
    Senior Member COLVERT's Avatar
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    Quote Originally Posted by oldcorollas View Post
    yeah, that's not too bad..

    on 40-45deg days in traffic, it will do that regardless of radiator guard.
    but if it does it cruising at 100km/hr... not ideal

    i think modern cooling systems are so good that they either just work, or something wrong and they go pop
    plus it's a lot about keeping your oil from burning, so if oil is good.. radiator is doing it's job...
    It's not so much the oil Burning but breaking down under excessive heat.

    Fully synthetic oil is good for 140 degrees at least before failure. However it's better to use 10/50 rather than 10/40 as a slightly larger range I guess.

  11. #10
    Senior Member COLVERT's Avatar
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    Quote Originally Posted by oldcorollas View Post
    yes, that.

    as for oil.. if the cooling is marginal, and you regularly ride on 40-45deg days.. then 10W-50 may be worthwhile... (why not synthetic 5W-50?? )
    If the weather is cold enough to merit 5W then I will be in my car with the heating full on.---Bike nicely tucked away in a warm dry garage.--

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