Kawasaki Z1000 Forum banner

1 - 16 of 16 Posts

·
Registered
Joined
·
38 Posts
Discussion Starter #1
Hey guys, newish rider here, and new to the Z1000. Have a concern with bubbles in the oil and wanted to get some thoughts on it.

2003 Z1000, 39'000kms. Previous owner used Lucas oil with 20% stabilizer. I wanted to be fancy and used Motul 7100 for the change I did 3000km's ago. After seeing some bubbles at the top, I got scared thinking I overfilled, so I drained a tiny bit, had to re-add some, which then used up my leftover Motul.

The other morning the oil level was close to the minimum mark so, because I didn't have any leftover motul and all shops were closed on Sunday, I topped it up with some Lucas Motorcycle 10w-40, hence the slight yellowish colour. (Motul is usually totally Red).

No residue or anything on the cap, seems totally clean and just oil. No temperature issues.
84879
To be fair, I never looked at the previous oil while the bike was running so I don't know if it was like this before. I've also never owned a street motorcycle so this is new to me.

The bike seems to run great, has tons of power. My friend riding behind my said it smelled like I'm burning a little oil, but nothing at all visual.

The bubbles go away after it sits. I'll also add that after the oil change I had the oil light and had to do the "loosen the oil filter to burp the system" trick.

Any advice/thoughts would be appreciated! Thanks
 

·
Registered
Joined
·
276 Posts
I don’t think having a small amount is surface air bubbles in the oil is necessarily a bad thing. I think when the engine is running some amount of air will get mixed into the oil and you can see a little bit of froth. In the old days they used to put engine oil in the front forks. And a common problem would be with the stroking of the shocks the air in the oil and mix together and start to get what I call a little bit foamy. Nowadays fork oil is specific to the forks in it’s been designed to not do that. Typically I don’t mix different brands of oil together because if you get an oil that has a heavier density it will sit at the bottom of the reservoir and the lighter density oil stay on the top which could be what you’re seeing.
 

·
Registered
Joined
·
38 Posts
Discussion Starter #3
Thanks a lot for the reply! Makes sense about the oil/air churning. I guess I've just never seen this sort of thing on a car or other vehicle since there's no window to look inside.

It WAS bubbling/frothing before I "mixed" oil brands. So even with pure Motul 7100 there was bubbles/froth. I try not to mix brands but I needed to ride and didn't want minimum oil.

bubbles only while engine is running.

I'm thinking I'm going to do a slightly early oil change here to avoid any difference in viscosity breakdown between the two, just switch to the Rotella T6 everyone seems to like.

Thanks again, I won't worry about it. Cheers!
 

·
Registered
Joined
·
276 Posts
Hey right on that sounds like a good plan. I just use the Kawasaki semi synthetic oil for now. I might switch to a full synthetic in the future but it’s so expensive and I don’t do a lot of hard riding with the bike so I’m not sure she really needs it you know. maybe post some more pictures of your bike as we all like to see these awesome machines :geek:.
 

·
Registered
Joined
·
38 Posts
Discussion Starter #6 (Edited)
Okay, sweet. Again, the bike sounds, runs, and pulls great. Haha here's my Z!! She's definitely got some war wounds but it's still an absolute blast to ride. Added a photo of the oil after it was sitting for a few minutes.
84889
84890
84891
 

Attachments

·
Registered
Joined
·
389 Posts
Bubbling typically happens ons short rides. It shouldnt be anything to worry about. On longer rides your oil shouldnt bubble at all

Verstuurd vanaf mijn SM-G975F met Tapatalk
 

·
Registered
Joined
·
276 Posts
Your bike looks real good brother. I really like the windshield and I’m not typically a windshield person on a Z 1000. Here’s a link to the dealer service manuals for all the bikes. I thought it might help you in the future

 

·
Registered
Joined
·
38 Posts
Discussion Starter #9
Thanks man, appreciate that! I'd like to get a smoother sounding exhaust, the Danmoto's are quite 'Brappy', but I don't mind them for now.

Thank you very much for the manual link!
 

·
Registered
Joined
·
4 Posts
Hi - having the exact same issue on my bike although it is a Zuki and not Kawa.

Did you manage to figure out why you have those bubbles - is it normal?

85476


After 5 min, the bubbles has settled and the oil again looks what I would call normal:

85477


What I can read from other replies on other site are:

1) It is normal... at least on a motorcycle after a heavy ride (I hope this is the correct answer)
2) Not normal - there is water in the oil. Either short trips or gasket blown (I ride no short trips and oil is brand new)
3) Overfilled engine - oil has been whipped (I did in fact overfill the engine and run with is - emptied what is similar to 2 oil filers and then the level was like on the last picture... at max.

So... Should I be worried?

Regards, Lars.
 

·
Registered
Joined
·
38 Posts
Discussion Starter #11
Hi - having the exact same issue on my bike although it is a Zuki and not Kawa.

Did you manage to figure out why you have those bubbles - is it normal?

View attachment 85476

After 5 min, the bubbles has settled and the oil again looks what I would call normal:

View attachment 85477

What I can read from other replies on other site are:

1) It is normal... at least on a motorcycle after a heavy ride (I hope this is the correct answer)
2) Not normal - there is water in the oil. Either short trips or gasket blown (I ride no short trips and oil is brand new)
3) Overfilled engine - oil has been whipped (I did in fact overfill the engine and run with is - emptied what is similar to 2 oil filers and then the level was like on the last picture... at max.

So... Should I be worried?

Regards, Lars.
Hey Lars, I still have had zero issues with the oil, so I'd say don't worry about it!! as shown, once it settles, your oil looks perfect. Maybe more experienced people can give a more educated answer?

Apologies if you know this, but keep in mind that proper oil level is measured when the engine is off, and when the bike is level (not on kickstand).

I had been filling my oil up to where it measure's "middle", with the engine on. (obviously filled it turned off, but I was checking the oil level with the engine running). This is NOT the correct way to measure your oil level, and I was overfilling, causing more than average bubbles.
 

·
Registered
Joined
·
4 Posts
Hi. Thank you for your reply.

And you are running on the same oil? As I understand, it is quite normal to have bubbles on to of the oil right after shutting off the engine.

Having done several car engine oil changes, this is my first MC oil change, and I am curious about every "issue" I find. On a car there are no eye sight window so you can't see the oil that fast after turning off the engine. And oil normally does not go to the gears nor turn at the same RPMs.

I am ready to change the oil again if it makes any difference, but as I understand, this is expected "behaviour". If I am wrong, please let me know.

 

·
Registered
Joined
·
38 Posts
Discussion Starter #13
Hi. Thank you for your reply.

And you are running on the same oil? As I understand, it is quite normal to have bubbles on to of the oil right after shutting off the engine.

Having done several car engine oil changes, this is my first MC oil change, and I am curious about every "issue" I find. On a car there are no eye sight window so you can't see the oil that fast after turning off the engine. And oil normally does not go to the gears nor turn at the same RPMs.

I am ready to change the oil again if it makes any difference, but as I understand, this is expected "behaviour". If I am wrong, please let me know.
oh, if you're coming from cars like I was, yea, don't worry about it 😁

I'm currently running Lucas Motorcycle oil. I WAS running Motul, but I found my engine to run smoother and shifts were quieter with Lucas.
 

·
Registered
Joined
·
4 Posts
oh, if you're coming from cars like I was, yea, don't worry about it 😁

I'm currently running Lucas Motorcycle oil. I WAS running Motul, but I found my engine to run smoother and shifts were quieter with Lucas.
So let me understand. You had Motul and now Lucas oil and bubbles are forming on both oils? In the same way?
 

·
Registered
Joined
·
38 Posts
Discussion Starter #16
So let me understand. You had Motul and now Lucas oil and bubbles are forming on both oils? In the same way?
correct. BOTH oils (Motul and Locus) produced a small amount of bubbling on top. This is normal.

Be 100% sure that your Castrol oil is meant for motorcycles. My Dad put Castrol car oil in his motorbike because he loves Castrol and didn't think there's a difference between motorcycle and car oil. Big mistake, he ruined his clutch. (motorcycle oil is formulated specifically for wet clutches).
 
1 - 16 of 16 Posts
Top