Milky fluid leak/overflow? - ZX6R Forum
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post #1 of 21 Old 09-05-2019, 09:07 AM Thread Starter
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Milky fluid leak/overflow?

So My 2015 zx6r is leaking/releasing what looks like a Milky fluid in the lower porting of the right side. The liquid is directly underneath a hose that after a quick look seems to be connected to the coolant reservoir (I haven't looked too deep yet).

It has happened both times I have been on the track. I have not noticed it on the street. Every time I take a look the liquitld is already dry and leaves kind of a white powdery residue/trail.

Any help on how to identify the problem (if any) and/or where to start? I'll leave a picture. Unfortunately I don't have a better one since my buddy wiped the bike down before I could take a picture.
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post #2 of 21 Old 09-05-2019, 09:46 AM
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Any loss of liquid - especially on the track - is a big problem, and unsafe for you and the other riders. You shouldn’t be riding the bike (at least on the track) until you get this figured out. What does your oil look like in the sight glass? Is it “milky”? What kind of coolant are you using? Definitely need to strip the bike down and inspect.
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post #3 of 21 Old 09-05-2019, 10:26 AM Thread Starter
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Originally Posted by Duc995 View Post
Any loss of liquid - especially on the track - is a big problem, and unsafe for you and the other riders. You shouldn’t be riding the bike (at least on the track) until you get this figured out. What does your oil look like in the sight glass? Is it “milky”? What kind of coolant are you using? Definitely need to strip the bike down and inspect.
I totally agree. I had to stop the day early because of it. The oil looks dark orange I would say and the oil level is at the top.

I can't really work on the bike this month. I might have to take it to am actual mechanic . I was hoping someone over here can point out a "most likely"
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post #4 of 21 Old 09-05-2019, 11:41 AM
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mines did this - it was the radiator cap.
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post #5 of 21 Old 09-05-2019, 02:05 PM Thread Starter
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mines did this - it was the radiator cap.
ahh, I will definitely check it out
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post #6 of 21 Old 09-05-2019, 02:26 PM
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That's radiator fluid coming from the overflow tank hose. Happens a lot on this bike with its 1.1 radiator cap.

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post #7 of 21 Old 09-05-2019, 03:14 PM
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That's radiator fluid coming from the overflow tank hose. Happens a lot on this bike with its 1.1 radiator cap.
What kind of coolant looks “milky”? Just curious, and for future reference...
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post #8 of 21 Old 09-05-2019, 03:32 PM
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What kind of coolant looks “milky”? Just curious, and for future reference...
It's just the residue that's left after it dries off. The green OEM one does that. I actually went and dug up some pics of my first TD with the zx6r. I had to keep wiping it off after every session.


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post #9 of 21 Old 09-05-2019, 04:11 PM Thread Starter
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Quote:
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What kind of coolant looks “milky”? Just curious, and for future reference...
It's just the residue that's left after it dries off. The green OEM one does that. I actually went and dug up some pics of my first TD with the zx6r. I had to keep wiping it off after every session. <img src="https://zx6r.com/images/smilies/lol.gif" border="0" alt="" title="Lol" class="inlineimg" />

Yeah! Exactly that. I saw Nother guy at the track that told me he had the same issue with his zx6r but never found out exactly what it was.

Do you think that replacing the cap would solve the issue? It seems to all dry on the bike and I can continue wiping it after each session but It kind of makes me uncomfortable.

I came home today and took the cap off to see if I see anything totally wrong but everything seemed fine. I got the bike all the way to 225 degree but I couldn't replicate it. The coolant came from exactly in the middle of low and full to the full line.
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post #10 of 21 Old 09-05-2019, 04:25 PM
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Yeah! Exactly that. I saw Nother guy at the track that told me he had the same issue with his zx6r but never found out exactly what it was.

Do you think that replacing the cap would solve the issue? It seems to all dry on the bike and I can continue wiping it after each session but It kind of makes me uncomfortable.

I came home today and took the cap off to see if I see anything totally wrong but everything seemed fine. I got the bike all the way to 225 degree but I couldn't replicate it. The coolant came from exactly in the middle of low and full to the full line.
Its fine. Just residue from the dried off coolant from the overflow tank. Might be able to prevent it if there's still air in the system and you burp it but it's not an issue.

I didn't get it with Engine Ice. Now using water and Hy-per cool with no issue.

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post #11 of 21 Old 09-05-2019, 11:15 PM
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A new genuine Kawa cap is your first thing to try. A Stant one is also an option but the one i bought didnt fit properly - and the tuner i use over here told me to go buy OEM.

IIRC correct they have changed the part number since the bike was new.
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post #12 of 21 Old 09-06-2019, 09:06 AM
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I wonder if using the 2.0 bar Graves radiator cap would be beneficial to prevent boiling over/ excess overflow but not sure if it'll cause any long term damage by raising the pressure that much. I'm sure it doesn't make a difference to them since they rebuild their race motors often but most people wont. It's what they use on their zx6r and zx10r builds.


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post #13 of 21 Old 09-06-2019, 10:56 AM
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I wouldn't immediately jump to a 2.0 bar cap......... you can get a 1.3 or even 1.6

many bikes now come standard with a 1.3
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Stupid people say stupid things on the internet, so be wary of who those people are. If you solicit advice on the internet, just keep in mind 99% of what you'll receive is not based on fact or science-and likely atleast 95% of it is based on bullshit and bravado regurgitated from some other schlub who also did not experience any of what they claim and are also full of shit. If you don't like my bluntness- too bad. I am not here to please you, so move along, your approval is not desired nor is it needed. So before opening your pie hole and adding more stupidity, perhaps sit back, listen, absorb and learn something. You know that saying, it is better to remain silent and thought a fool than to open your mouth and remove all doubt!
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post #14 of 21 Old 09-06-2019, 11:48 AM
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I wouldn't immediately jump to a 2.0 bar cap......... you can get a 1.3 or even 1.6

many bikes now come standard with a 1.3
Cool. The zx10r comes with a 1.3 cap so I'll be ordering that.

Part 49085-1078

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post #15 of 21 Old 09-14-2019, 03:35 PM
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I installed my zx10r 1.3 cap yesterday. Much better than the zx6r 1.1 which would start opening into the coolant overflow as soon as 190 degrees hit.
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