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

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breather timing, sportster, sumping, xlch

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  #11  
Old 25th March 2021
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Quote:
Originally Posted by sungod View Post
Parts book says 63 and up for the slinger.
good call on that sungod.it's not uncommon for the daisy wheel oil/air seperator to be swapped after this many years,but there's no way to know without looking on the end of the generator.
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  #12  
Old 25th March 2021
XL 604 XL 604 is offline
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Can someone run there bike with the rear engine vent (the one behind the rear cylinder) and run it into an empty bottle and see how much oil comes out if any. Mine is almost like another return so much oil comes out
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  #13  
Old 26th March 2021
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Transfer valve stuck?
Bad sprocket seal?
You should not get any measurable oil out the primary vent.
Got any pics?
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  #14  
Old 26th March 2021
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Thats not a primary vent its an engine breather, I welded the transfer vent when I had the cases split. I have significant oil from that hose.
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  #15  
Old 26th March 2021
needspeed needspeed is offline
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The crankcase vent on a 1960 goes to a fitting on the crankcase behind the rear cylinder. Is it plumbed into the oil tank?

Also as Brucstoud mentioned a '60 didn't come with the slinger that looks like a fender washer. It would help to know what's there on the end of the generator.

As mentioned, reducing the amount of oil in the tank would be a good experiment to see if there is any change. If there is about a half qt of oil in the crankcase and 3 qt in the tank that would be too much oil in the system.

Be careful with that drain plug. They strip easily.
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  #16  
Old 26th March 2021
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Default 1960 xlch

Quote:
Originally Posted by XL 604 View Post
Can someone run there bike with the rear engine vent (the one behind the rear cylinder) and run it into an empty bottle and see how much oil comes out if any. Mine is almost like another return so much oil comes out
Just for a test drain the primary and refill with proper amount.Run the engine and check the vent tube in the oil bag and keep an eye on the tank oil level.See if anything changes.How deep of a rebuild was done?Were the cases split?
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  #17  
Old 26th March 2021
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We have a terminology problem I think.
The engine breather is not behind the rear cylinder on a 60 CH.
You mean the oil tank vent?
woop, needspeed beat me to it.

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  #18  
Old 26th March 2021
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Ok as far as that picture goes I am referring to the Vent. My vent line has oil coming from the motor, does anyone else experience this?
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  #19  
Old 26th March 2021
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That's an air vent coming from the tank to the rear of the motor.
See the directional arrow above.
Normally, air / oil mist will come back into that connection at the motor from the tank thru a passage and back into the cam chest.
So it's not normal for enough oil at that connection on the tank to appear to be another return line.
Something is wrong.
Lines not connected properly.
Or breather not timed right.
Maybe 180 out.
Breather tube in front of the cam chest blocked.
I'm sure there are others.
Oil filter stopped up.
How much oil are you loosing?
I agree with others to check that.
Added too much oil to the tank?

Last edited by Hippysmack; 26th March 2021 at 01:44..
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  #20  
Old 26th March 2021
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Anyone willing to entertain me and run there bike with the "vent" line removed.
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