2012 1199S smoking at start-up. PCV system in bike?

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Joined
Oct 15, 2016
Messages
147
Location
Loretto, MN
Hello all,
I recently purchased a 1199 TriColor and it appears to be getting oil into the exhaust after sitting For a few days. I do not believe it to be the “ring” sealing issue as it will smoke out the exhaust and from under the front mid-fairings until the engine reaches approx 150 degrees(warm enough to burn it off the inside of the exhaust). The other reason I suspect it to possibly be a breather/PCV issue is I will actually get a drop of oil(after I start it) from the exhaust connection if it sits more than a couple weeks...

My question is: is there actually a PCV system on these bikes? Or does the breather act as the PCV system? I’m wondering if I may have an excess of oil going thru this system and dumping oil from the intake system into the engine.... Has anyo else experienced this, and if yes, what was the corrective action?

Note: I have not torn into the bike yet to see if there is excess oil in the airbox asy that could be causing thought I’d check here first for others experiences.

Thanks!
-John
CF78C4C7-07F9-413E-91D2-EEE944B4784D.jpeg
 
John so there isn’t a traditional PCV valve. There is a breather tube from the vertical cylinder head that passes through the frame and terminates into the let’s call it a “breather diffuser assembly” on the air box base. There is the Y pipe rubber hose going from the engine case to the same assembly on the air box plate. There is nothing mechanical in the air pipe fitting on the cylinder head and from what I have ever seen,nothing mechanical inside the diffuser. The diffuser is of course open to the inside of the air box. There is also a small drain/vent hose with a restricted termination that goes from the base plat to the outside of the bike. That’s basically your positive case vent system. Many have reported an over fill condition will dump some oil into the air box. Normally you will get a slight haze of oil dusting around the diffuser assembly from it doing what it does.
 
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John so there isn’t a traditional PCV valve. There is a breather tube from the vertical cylinder head that passes through the frame and terminates into the let’s call it a “breather diffuser assembly” on the air box base. There is the Y pipe rubber hose going from the engine case to the same assembly on the air box plate. There is nothing mechanical in the air pipe fitting on the cylinder head and from what I have ever seen,nothing mechanical inside the diffuser. The diffuser is of course open to the inside of the air box. There is also a small drain/vent hose with a restricted termination that goes from the base plat to the outside of the bike. That’s basically your positive case vent system. Many have reported an over fill condition will dump some oil into the air box. Normally you will get a slight haze of oil dusting around the diffuser assembly from it doing what it does.


Thank you for the info endodoc, I appreciate the information! I’ll take a look at that next time I have the tank raised.

-John
 

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