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Thread: Running on idle for long time

  1. #16
    Registered User lkchris's Avatar
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    I vaguely recall an early Oilhead service manual containing advice that maybe 30 minutes was the max for idling.

    Of course the Police need more than that (and perhaps a fast idle) and those bikes have electric fans for the oil cooler.

    Thing is, the amount of heat your motor generates is directly proportional to the amount of fuel burned, and it isn't burning much at idle. Diesels are even better in this regards as they vary the fuel-to-air ratio and at idle it's maybe 1-150 as opposed to the 1-15 (stoichiometric) gasoline engines usually run at. Some diesels come with software to boost idle speed should they overcool during extended idling.

    So, when you're sitting at road construction, nervous throttle blipping only serves to put more heat in your engine.

    Many are confused by old time American cars with water pump mounted radiator fans that did tend to overheat at idle. That's not applicable to aircooled engines and it doesn't happen.
    Kent Christensen
    21482
    '12 R1200RT, '02 R1100S, '84 R80G/S

  2. #17
    Yesterday the dealer told me that have had multiple cases as described by the OP. When they lose oil the bike shuts down. This ecplains why the OP had to charge the battery because even though the engine is protected the key stays on. They told me the bikes run normally after new oil etc.

    See my post in the Wedge K bike section (safety switch) regarding my loss of oil and oil pressure. The bike is okay thanks to this protection. The mechanics think this protection was added after the 1100s or 1150s era.
    Seek Fun. "Any fool can criticize, condemn and complain--and most fools do" BF
    2009 K1300GT,
    2011 R1200GSA
    2014 Kawasaki DTracker; 2016 Honda NC700 DCT

  3. #18
    Registered User temesvar's Avatar
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    Quote Originally Posted by roamingbeemer View Post
    Yesterday the dealer told me that have had multiple cases as described by the OP. When they lose oil the bike shuts down. This ecplains why the OP had to charge the battery because even though the engine is protected the key stays on. They told me the bikes run normally after new oil etc.

    See my post in the Wedge K bike section (safety switch) regarding my loss of oil and oil pressure. The bike is okay thanks to this protection. The mechanics think this protection was added after the 1100s or 1150s era.
    Am not sure what safety feature are you talking about. My bike never shut off until I did after about 5 hours.

  4. #19
    I see that now. I guess some lose all their oil and shutdown. Why did you need to charge your battery if it was still running? Or did the heat cause it to discharge?

    Anyways I learnt these things shutdown with a loss of oil pressure. My K bike certainly shut down and started right back up after adding fresh oil. It should have been toast with no oil and the dealer told me of other examples of complete oil loss from forgotten idling R bikes. One where the valve cover was warped even.
    According to them they have seen bikes that were left idling more than once.
    Last edited by roamingbeemer; 11-10-2017 at 03:10 PM.
    Seek Fun. "Any fool can criticize, condemn and complain--and most fools do" BF
    2009 K1300GT,
    2011 R1200GSA
    2014 Kawasaki DTracker; 2016 Honda NC700 DCT

  5. #20
    Registered User lkraus's Avatar
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    Quote Originally Posted by roamingbeemer View Post
    I see that now. I guess some lose all their oil and shutdown. Why did you need to charge your battery if it was still running? Or did the heat cause it to discharge?
    The alternator produces minimal power at idle and can lead to a small battery discharge. You need get the revs up a bit to produce sufficient power to charge.
    Larry
    2006 R1200RT

  6. #21
    Interesting. I thought that problem went away since the old permanent magnet generators.
    Seek Fun. "Any fool can criticize, condemn and complain--and most fools do" BF
    2009 K1300GT,
    2011 R1200GSA
    2014 Kawasaki DTracker; 2016 Honda NC700 DCT

  7. #22
    Registered User temesvar's Avatar
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    Quote Originally Posted by roamingbeemer View Post
    I see that now. I guess some lose all their oil and shutdown. Why did you need to charge your battery if it was still running? Or did the heat cause it to discharge?

    Anyways I learnt these things shutdown with a loss of oil pressure. My K bike certainly shut down and started right back up after adding fresh oil. It should have been toast with no oil and the dealer told me of other examples of complete oil loss from forgotten idling R bikes. One where the valve cover was warped even.
    According to them they have seen bikes that were left idling more than once.
    Glad to see am not the only idiot to leave the bike idling... and leave home. Was a slight emergency, but that is no excuse!
    There was some loss of oil, but minimal. Am surprised the battery was strong enough to keep the bike running. Besides, I had the Hi
    bean on, which was the reason I turned it on and left on idle, to see how hot the new LED bulb will get. The idea was 20 min, not 5 hours!
    Recharged the battery and is good as it should be.

  8. #23
    MOA #24991 Pauls1150's Avatar
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    So, how hot did your LED get? I'd guess that being non-rolling, and in a closed garage (I hope), would be the "worst case" scenario. Also wondering if the heat appeared to reduce the light output.

  9. #24
    Registered User temesvar's Avatar
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    Quote Originally Posted by Pauls1150 View Post
    So, how hot did your LED get? I'd guess that being non-rolling, and in a closed garage (I hope), would be the "worst case" scenario. Also wondering if the heat appeared to reduce the light output.
    Have HID for Lo, only the Hi is LED. It was hot, but no damage caused by the heat, so, as you say, the worst case is not worrisome.
    As for the light output when hot...that was the last thing would cross my mind at that time! All I was looking for was if it is still on and
    didn't blow up, and none of the wires melted. It was in garage, door open though! (safe neighborhood!) Am sure neighbors thought I
    was home. Lights were on...

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