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

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  #1  
Old 18th August 2009
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Default Strange Oil Bottle thing

I bought an '81 IH 2 months ago and I'm still in the process of going through the bike. There's this strange little bottle type thing on the bike; it resembles the little shot, hard liquor bottles you see on airplanes and hotel rooms. It has at least one hose running to it; probably 2 though. It's protruding down from under the bike almost behind my left foot.

The individual I bought it from told me he put it there as a precautionary measure to keep oil from ever getting on the rear brake rotor. It seemed like a good thing at the time. However, I notice when I sometimes give the bike too much throttle -- when warming it up -- that oil sometimes comes out of it. Otherwise I can't really tell if the bike leaks or not.

in any case, does anyone know what this thing is supposed to be?
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  #2  
Old 18th August 2009
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Sounds like a catch bottle for the crankcase breather tube/s coming from the front of the cam cover. Since this tube can drip or spew a little oil, the PO probably fitted a container to catch it.

Eric
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  #3  
Old 18th August 2009
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It sounds like a home made catch can. Also, it's an '81 ironhead it leaks oil!, if doesn't leak oil you don't have any. Before EPA standards became so tough h-d's cases vented to the ground.
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Old 18th August 2009
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Default That's correct. And that's where it SHOULD be venting...

...not into any "catch can".

How the hell is that bike supposed to mark it's territoty, then?
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  #5  
Old 18th August 2009
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NONSENSE.. it's the oil reservoir for the James Bond oil slick, when you"re being chased by the Po-leese...
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  #6  
Old 18th August 2009
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What year bike? If it's the old style oil pump, it may not be timed correctly. That could cause the bike to wet sump and spew more oil out the vent tube than if the pump were timed correctly.

It could have a slightly leaky check valve on the supply side, causing the same problem. The ones I've seen that wet sumped from a leaky check valve were obvious. If it only catches a small amount, everything may be normal.
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  #7  
Old 18th August 2009
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post a pic of this thing....I have a catch can on a big twin motor...it should have a breather on it and some way to drain it....if it is the size of a "shot" size Jackie-D bottle, it's too small to do much good
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  #8  
Old 19th August 2009
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post pictures.. id like to see the catch can idea. ive been thinking of something custom for my bike.. ive seen them before but id like to see what you guys have. no offense but i dont feel like having oil all over my rear tire.. my chances is i will roll overthe puddle i created.
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  #9  
Old 19th August 2009
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Quote:
Originally Posted by 69SPORTSTER View Post
NONSENSE.. it's the oil reservoir for the James Bond oil slick, when you"re being chased by the Po-leese...
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  #10  
Old 27th August 2009
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Quote:
Originally Posted by GA_Ironhead View Post
What year bike? If it's the old style oil pump, it may not be timed correctly. That could cause the bike to wet sump and spew more oil out the vent tube than if the pump were timed correctly.

It could have a slightly leaky check valve on the supply side, causing the same problem. The ones I've seen that wet sumped from a leaky check valve were obvious. If it only catches a small amount, everything may be normal.
It's an 81. What's a small amount? Although something is wrong -- it stalls and front plug is lean.
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