Oil in the Air Box

  • daveo
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05 Jul 2024 19:39 - 05 Jul 2024 20:03 #901804 by daveo
Oil in the Air Box was created by daveo
Was finding oil puddling in the bottom of my air box...

It was coming out the rubber hose that connects the breather cover to the air box, and making a bloody mess...

Is that a common issue with the big fours?




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1982 KZ1100-A2
Last edit: 05 Jul 2024 20:03 by daveo.

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  • SWest
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05 Jul 2024 21:17 #901805 by SWest
Replied by SWest on topic Oil in the Air Box
Are you riding it hard?
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229
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05 Jul 2024 22:19 - 05 Jul 2024 22:25 #901806 by daveo
Replied by daveo on topic Oil in the Air Box
Probably, but not more than usual...well, maybe a little.

[img


But I don't feel guilty...she likes it you know.

 
1982 KZ1100-A2
Last edit: 05 Jul 2024 22:25 by daveo.
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06 Jul 2024 01:38 - 06 Jul 2024 01:41 #901809 by Warren3200gt
Replied by Warren3200gt on topic Oil in the Air Box
Time for a compression test. Oil in the air box is caused by excessive positive crankcase pressure due to compression blowby then venting through the crankcase breather. 
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Z1000J2 somewhat modified!
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Last edit: 06 Jul 2024 01:41 by Warren3200gt.
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06 Jul 2024 02:04 #901811 by Wookie58
Replied by Wookie58 on topic Oil in the Air Box
Excess crankcase pressure can also be caused by a blockage/restriction in the breather system
1982 KZ1000 Ltd
www.kzrider.com/forum/11-projects/617631...-82-begins?start=192
kzrider.com/filebase-alias?view=download...d-fault-diagnosis&ca
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06 Jul 2024 02:16 #901812 by hugo
Replied by hugo on topic Oil in the Air Box
.............................................or overfilling the crank with oil.
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06 Jul 2024 06:03 #901816 by Nessism
Replied by Nessism on topic Oil in the Air Box
How much oil?  Some light residue is normal.  A puddle, is not.  Also, what type of oil are you using?  It may be time for 20W-50, if you ride when it's warm.
Ed
Carb O-ring Kits : www.kzrider.com/forum/3-carburetor/61807...-o-ring-kits?start=0

www.kzrider.com/forum/faq-wiki/618026-new-owner-things-to-know

1981 KZ750E2
www.kzrider.com/forum/11-projects/604901...z750e-project-thread

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06 Jul 2024 13:21 - 06 Jul 2024 13:27 #901829 by daveo
Replied by daveo on topic Oil in the Air Box
Been using Rotella 15W40 T4...
Wasn't finding much oil, but residue buildup over the span of several 5-8k rpm rides.

This stopped that completely:



...and there are no oil leaks anywhere on the motor!


[img


Dry as a bone!




[img
1982 KZ1100-A2
Last edit: 06 Jul 2024 13:27 by daveo.
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06 Jul 2024 16:28 #901840 by F64
Replied by F64 on topic Oil in the Air Box
Yeah, That's why I put oil vapor catch cans on my cars.
Gotta love sending oil vapors into your cylinder.
Drops the octane value on your gasoline.
Which makes you more susceptible to detonation.
Not emissions friendly but I reroute the hose to vent below the bike. Plug the airbox fitting.
You could put a pressure gauge on the hose to see how much blowby you are getting.

Mike Nixon's opinion on this
motorcycleproject.com/text/crankcase_recirc.html
 
81-KZ440-D2.
Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
Motogadget m-unit blue installed 2017.
LIC, NY
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06 Jul 2024 18:09 - 06 Jul 2024 19:16 #901842 by daveo
Replied by daveo on topic Oil in the Air Box
7/06/24 compression check results:
 cyl      psi
1 & 4  160
2 & 3  145-150

[img



Half a quart of oil evaporated on today's 100 +/- mile ride...

She loved every breathtaking moment through which we flew!!!

[img



 
1982 KZ1100-A2
Last edit: 06 Jul 2024 19:16 by daveo.
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07 Jul 2024 04:37 #901846 by Wookie58
Replied by Wookie58 on topic Oil in the Air Box

Been using Rotella 15W40 T4...
Wasn't finding much oil, but residue buildup over the span of several 5-8k rpm rides.

This stopped that completely:



...and there are no oil leaks anywhere on the motor!


[img

 
Love that solution Dave, is that "ram air" filter foam or something similar that won't cause a pressure build up??
1982 KZ1000 Ltd
www.kzrider.com/forum/11-projects/617631...-82-begins?start=192
kzrider.com/filebase-alias?view=download...d-fault-diagnosis&ca

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07 Jul 2024 06:14 - 07 Jul 2024 06:18 #901851 by daveo
Replied by daveo on topic Oil in the Air Box
Yes, and it performs much better than expected.

It's a strip cut from a sheet of RamAir filter media I acquired nearly ten years ago.

It may be similar to the material used in their product offerings today.
 




[img



 
1982 KZ1100-A2
Last edit: 07 Jul 2024 06:18 by daveo.
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