milky oily crap in airbox - Honda Motorcycles - FireBlades.org
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post #1 of 28 Old 02-13-2012, 5:44 PM Thread Starter
 
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milky oily crap in airbox

hi lads, took off the tank to have a look at the airfilter, when i opened the airbox there was milky looking oil and water mixture to the front of the airbox, any ideas what this is and a cause, thanks
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post #2 of 28 Old 02-13-2012, 6:48 PM
 
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Re: milky oily crap in airbox

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Originally Posted by hwap View Post
hi lads, took off the tank to have a look at the airfilter, when i opened the airbox there was milky looking oil and water mixture to the front of the airbox, any ideas what this is and a cause, thanks
Sounds like the previous owner stored his Crack in the air box and it got wet
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post #3 of 28 Old 02-13-2012, 7:07 PM Thread Starter
 
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Re: milky oily crap in airbox

i wish
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post #4 of 28 Old 02-13-2012, 7:50 PM
 
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Re: milky oily crap in airbox

does it overheat at all????
crack in the air box...lol maybe i should check mine.
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post #5 of 28 Old 02-13-2012, 9:41 PM
 
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Re: milky oily crap in airbox

when oil mixes with water or coolant it turns white, niether should be in tthere, whats your oil look like?
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post #6 of 28 Old 02-14-2012, 3:06 AM
 
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Re: milky oily crap in airbox

If u notice th hose is probably running from th top of th engine to th air box. It's a breathing system, plus it forces any excess exhaust that didn't make it out of th chamber to b sucked back into th chamber for combustion. An emissions system. My guess is ur oil level is above normal hence y u see th oil in ur air box. It's actually normal. I had an 06 Suzuki that had a similar set up but there was a sponge thing that caught th oil on its way to th air box.
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post #7 of 28 Old 02-14-2012, 3:24 AM
 
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Re: milky oily crap in airbox

Is it a K&N or other oiled cotton gauze type air filter? If so you could have gotten water in your airbox and you're seeing the mixture of water and oil from the filter.
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post #8 of 28 Old 02-14-2012, 5:32 AM
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Re: milky oily crap in airbox

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Originally Posted by crazie929 View Post
plus it forces any excess exhaust that didn't make it out of th chamber to b sucked back into th chamber for combustion.

Ummm...say what?
Never heard or seen this before.
How would exhaust gas get into the airbox?

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post #9 of 28 Old 02-14-2012, 5:34 AM
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Re: milky oily crap in airbox

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Originally Posted by hwap View Post
hi lads, took off the tank to have a look at the airfilter, when i opened the airbox there was milky looking oil and water mixture to the front of the airbox, any ideas what this is and a cause, thanks

The oil is just probably normal residue from the crankcase breather.
The water is most likely from rain or washing water getting in via the intakes. Clean it out and check it again next time you replace the filter.

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post #10 of 28 Old 02-14-2012, 8:25 AM Thread Starter
 
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Re: milky oily crap in airbox

hey lads, yes its a k&n air filter, the oil in the casing looks really clean and fresh,i syringed out a bit to have a look, there is a bit of a miss when accelerating hard, power is ok then a slight blip then back on power, had a zzr a few years back that done the same but it was caused by a single exhaust conversion, only have the bike a few months, i checked the plugs and they seem fine, iridium long life plugs. could the miss and the milky oil be related, the bike's temp is fine no overheating probs
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post #11 of 28 Old 02-14-2012, 8:49 AM
 
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Re: milky oily crap in airbox

It could be the K&N was over oiled perhaps if the previous owner has tried to clean it.. Was it a red oil? Is the miss when on full throttle or when coming on and off the throttle about 6k?



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post #12 of 28 Old 02-14-2012, 8:50 AM
 
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Re: milky oily crap in airbox

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Originally Posted by crazie929 View Post
If u notice th hose is probably running from th top of th engine to th air box. It's a breathing system, plus it forces any excess exhaust that didn't make it out of th chamber to b sucked back into th chamber for combustion. An emissions system. My guess is ur oil level is above normal hence y u see th oil in ur air box. It's actually normal. I had an 06 Suzuki that had a similar set up but there was a sponge thing that caught th oil on its way to th air box.


Overfilled my Gixer got the same result!

Plus loads of smoke and got black flagged
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post #13 of 28 Old 02-14-2012, 10:09 AM
 
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Re: milky oily crap in airbox

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Originally Posted by bladeracer View Post
Ummm...say what?
Never heard or seen this before.
How would exhaust gas get into the airbox?
Page 1-40 of th Honda service manual. Under 'Crankcase Emission Control System' - "Blow-by gas is returned to the combustion chamber through the air cleaner and throttle body."
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post #14 of 28 Old 02-14-2012, 10:11 AM
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Re: milky oily crap in airbox

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Originally Posted by crazie929 View Post
Page 1-40 of th Honda service manual. Under 'Crankcase Emission Control System' - "Blow-by gas is returned to the combustion chamber through the air cleaner and throttle body."

That is crankcase pressure, not exhaust gas.

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post #15 of 28 Old 02-14-2012, 10:21 AM
 
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Re: milky oily crap in airbox



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Originally Posted by bladeracer View Post
That is crankcase pressure, not exhaust gas.
correct
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