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Old 10-25-2012, 10:01 AM   #1
DeeGee OP
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Oil Traces In Airbox??

I'm just servicing the bike after our latest adventure and I've just checked to see how the air filter is as I have Pyndon's per-filter fitted. There's a fair bit of oil on the front intake. Should I be worried at all and any suggestions as to why it's done it??
A few pics below.

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Old 10-25-2012, 10:11 AM   #2
AdvGa
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You could try this:
Bypass the Crankcase Oll Breather Hose to AirBox with a Filter and Cap the AirBox Inlet.

http://www.advrider.com/forums/showp...23&postcount=6









Also, you may have a Bad Crankcase Seal:

http://ktmtalk.com/index.php?showtopic=408017

Excess Blowby from crankcase breather, onto air filter

In my case I fixed the excess oil blowby from the crankcase by replacing "shaft seal ring 12x20x5B " part # 0760122050
avilable from munns racing online
it is located in the alternator cover and seals the Crankshaft Balancer .
if you do it you may want to order a new alternator cover gasket also

evidently the crankcase pressure is metered and vents through the crank balancer shaft .
If the seal is shot it blows major oil for some reason
mine was rock hard and shrunken . It was blowing oil everywhere , especially when doing over 90 mph sustained

fish picture courtesy of Munns " shop online" feature ;



AdvGa screwed with this post 10-25-2012 at 12:12 PM
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Old 10-25-2012, 10:56 AM   #3
DeeGee OP
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I've got a pre filter fitted and looking at the air filter it's done a crackin' job as it looks new apart from the oil trace. Can't log onto the link for some reason
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Old 10-25-2012, 11:06 AM   #4
VTwins4me
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My money is on prolonged high speed running - ie 200 miles @ 90mph?

Clean it up & look again in a couple of weeks.
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Old 10-26-2012, 08:39 AM   #5
KEELAYMONSTER
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My 950 did the same. Found mine was due to a balancer shaft seal failure. The case breather port is right above this seal. Its very easy to check and replace. Just make sure you have a spare ignition cover gasket.
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Old 10-26-2012, 08:49 AM   #6
TheMuffinMan
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Quote:
Originally Posted by KEELAYMONSTER View Post
My 950 did the same. Found mine was due to a balancer shaft seal failure. The case breather port is right above this seal. Its very easy to check and replace. Just make sure you have a spare ignition cover gasket.
This, it's easy to change. Gasket is $25, and the seal is $10 or something.
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Old 10-26-2012, 10:56 AM   #7
scorpion
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Quote:
Originally Posted by TheMuffinMan View Post
This, it's easy to change. Gasket is $25, and the seal is $10 or something.
I just ordered the parts for my fix. I'll try and take some photos when I get in there.
May install the K&N breather filter if I can get hold of one.
There was an K&N part number floating around somewhere. . .
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Old 10-27-2012, 06:01 AM   #8
Spark01
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Quote:
Originally Posted by scorpion View Post
There was an K&N part number floating around somewhere. . .
k&n 62-1110 this one i used
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