Overheating returns? - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 20 (permalink) Old 04-01-2015, 05:30 PM Thread Starter
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Overheating returns?

I was hoping this issue was over, but unfortunately its not.
Its very odd behaviour, maybe you guys might have seen this before.

Turn the bike on, leave it running.. after a few minutes (on kick stand), the temerature will eventually reach 220, fan clicks on.. temperature drops back to 210, fan turns off. everything seems normal.

However, went for a ride today, hit 220 while riding.. i cant tell if the fan clicks on as i have my helmet on. Temperature slowly creeps up to point of over heating???

taking it back to the shop. Any thoughts?
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post #2 of 20 (permalink) Old 04-01-2015, 06:06 PM
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Air in the system.
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post #3 of 20 (permalink) Old 04-01-2015, 06:20 PM
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Air in the system.
Yep, run the bike while it is on its side stand and pull the radiator cap and top it off. Make sure your overflow reservoir level is okay as well.



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post #4 of 20 (permalink) Old 04-01-2015, 08:28 PM Thread Starter
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Thanks guys, ill have then check it or tomorrow. Back to the shop.
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post #5 of 20 (permalink) Old 04-01-2015, 08:30 PM Thread Starter
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Can you explain why that is?
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post #6 of 20 (permalink) Old 04-01-2015, 09:41 PM
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From draining and refilling the coolant system without burping, or without burping enough. It's discussed in the service manual.
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post #7 of 20 (permalink) Old 04-01-2015, 11:39 PM
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I've burbed my cooling system 3 or 4 times now. It's very easy.
I've posted in detail about the process is a couple threads.
If you're interested, try the advanced search. Keywords burping coolant. Put jondog9 in the username.

John, 2000 RC51 #000100

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post #8 of 20 (permalink) Old 04-02-2015, 12:44 PM
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I've burbed my cooling system 3 or 4 times now. It's very easy.
I've posted in detail about the process is a couple threads.
If you're interested, try the advanced search. Keywords burping coolant. Put jondog9 in the username.
I get a couple of guys over for beers and and after the bike is warmed up and with the radiator cap removed we just lean the bike all the way to the right and then all the way to the left and automagically it works every time
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post #9 of 20 (permalink) Old 04-02-2015, 12:59 PM
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I get a couple of guys over for beers and and after the bike is warmed up and with the radiator cap removed we just lean the bike all the way to the right and then all the way to the left and automagically it works every time
Hadn't heard of leaning to the right then back to the left.
Seems like you couldn't go to far to the right without coolant spilling out, especially if the bike is running and over 175F, but I see the logic.
Have you tried just shaking the piss out of the bike?

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post #10 of 20 (permalink) Old 04-02-2015, 01:06 PM
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Oh it makes a mess, but with the engine running not as much comes out as you would imagine and I am track only so it is just distilled water so no messy glycol to clean up I just let whatever spills out evaporate in the driveway.
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