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Ironhead Sportster Motorcycle Talk (1957-1985) For all those that wanna talk about Ironhead Sportster Motorcycles

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  #151  
Old 6 Days Ago
Rolli Rolli is offline
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Quote:
Originally Posted by IronMick View Post
A few of us on this forum have run a vent line from the 6:00 o'clock position for years now. In our experience it does make the engine run noticeably more freely. I run mine all the way back to the rear muffler bracket. I get a few drips out of it after a "spirited" ride

And yes, it does function from the reed/check valve assembly...

I my opinion, the original breater is piece of crap. Also if you renew it.
Since two years i run both breathers, the OEM and my special one mentioned above.
It drains much more mayo out of the engine then the original one.
You will notice this only riding in temperatures below 15°C as moisture in the air increases.
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  #152  
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blk80bike blk80bike is offline
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Quote:
Originally Posted by IronMick View Post
A few of us on this forum have run a vent line from the 6:00 o'clock position for years now. In our experience it does make the engine run noticeably more freely. I run mine all the way back to the rear muffler bracket. I get a few drips out of it after a "spirited" ride

And yes, it does function from the reed/check valve assembly...

I was pretty sure that the lower port also operates through the one way valve but I sometimes find myself overthinking things. I'm going to plumb it in tomorrow and run it the same way you described. I'm thinking a few zip ties will do the trick. I don't have a lot of oil making its way into the ham can anymore since I did the spray with WD40... but I'm hoping that this will eliminate the majority of the oil that finds its way up there.
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  #153  
Old 5 Days Ago
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By opening the lower 6 oclock position you are defeating the oil drain feature built into the cover valve.

You will find a very small hole that allows any oil that gets by the valve to drain back into the motor. When you connect a hose to the bottom fitting the oil will run out the hose instead of draining back into the motor.
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  #154  
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blk80bike blk80bike is offline
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Quote:
Originally Posted by ryder rick View Post
By opening the lower 6 oclock position you are defeating the oil drain feature built into the cover valve.

You will find a very small hole that allows any oil that gets by the valve to drain back into the motor. When you connect a hose to the bottom fitting the oil will run out the hose instead of draining back into the motor.
That's pretty much what I was thinking. That tiny hole is supposed to allow accumulated oil to drain back into the motor but it doesn't seem to work nearly as well as it should.
Guess I'll see what happens...I just plumbed the brass fitting and vapor hose.
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  #155  
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Quote:
Originally Posted by ryder rick View Post
... When you connect a hose to the bottom fitting the oil will run out the hose instead of draining back into the motor.
Quote:
Originally Posted by IronMick View Post
... I run mine all the way back to the rear muffler bracket. I get a few drips out of it after a "spirited" ride ...
Only a few drips, and only under a limited circumstance.
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  #156  
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I've been running the 2-hose setup on mine for years. Yes, a few drips come out of the hose if the bike is ridden hard, but the engine revs quicker and there's no oil blowing on the side of the bike any more.

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