Head Breather ?
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Seasoned HDF Member
Joined: Sep 2012
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From: almost there
If you think about it, on a normal set up, the carb vacuum is constantly pulling on the head breathers to vacuum off crank pressure.
Where, one venting hose to atmosphere is not getting the job done.
Where, one venting hose to atmosphere is not getting the job done.
Dirt don't hurt
Joined: Jan 2011
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From: Haslet Texas
S&S is good with the engine design (they really ought to know what they are talking about) so why are you unhappy with it?
FWIW you would be amazed at how little a hole it really takes to vent something.
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Seasoned HDF Member
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From: almost there
Right now both heads have separate outlets then hosed together with a T fitting in the middle with another hose dropping dn to the bottom of tranny open ended.
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Seasoned HDF Member
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From: almost there
S&S as you know runs the breathers to the carb...
Stellar HDF Member
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From: ct
And that is exactly where I rerouted mine back to,but I'm the only one I believe. All has been perfect venting for years,before and after my build. Oil to the carb indicates a problem,too much oil in the tank or something else. But maybe the bottom breather is just better.
Last edited by glidein wide; Jun 7, 2017 at 04:49 PM.
Thread Starter
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Seasoned HDF Member
Joined: Sep 2012
Posts: 6,570
Likes: 590
From: almost there
And that is exactly where I rerouted mine back to,but I'm the only one I believe. All has been perfect venting for years,before and after my build. Oil to the carb indicates a problem,too much oil in the tank or something else. But maybe the bottom breather is just better.
Stellar HDF Member
Joined: Jan 2015
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From: ct
Maybe after your motor is worn out in ten years,twenty years,it should be running clean.
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Thread Starter
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Seasoned HDF Member
Joined: Sep 2012
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Likes: 590
From: almost there
Old timer bought a new bike about 10 yrs ago and kept have problems with carbon build up until he rerouted the breather out to open air.
Also the breather is putting hot air in the carb with dirty oil.
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From: ct
. Krank vent makes a check valve type of unit also,that controls oil misting. The old man probably kept his oil level right to the full mark which is a no no ..imho... Plug checking would reveal any potential carbon building. Like Texas said,It doesn't take a big hole to vent her out.. you'll find something..
Last edited by glidein wide; Jun 7, 2017 at 07:07 PM.