Alternate Air Filter

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You can also vent the oil tank without running any breather hose into the air filter/carbs.

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Tornado said:
Seems to be a standard K&N crankcase breather filter common on car setups. It will give off light mist of oil vapour (my large oem style k&n in hamcan airbox does this at idle, hard to see unless sunlit just right and no wind, looks like light smoke).
Any vapour will leave oil build up as it cools on surfaces. I'd expect a puddle of oil in the hose if it is the lowest point before filter. That's why a catch can is used in many bikes/cars.
My modern Triumph has a short bit of tubing off bottom of airbox to accumulate this condensed oil vapour. Tube is sealed off at bottom end. Supposed to remove, drain and replace at regular intervals. Hardly anyone ever does it. No harm comes.
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Thank you !
 
I run the line to a catch bottle that I wedge in the battery tray. There is always a smear of smeg in the bottom that I think would collect/drip from an end of line filter.
 
Mike In Mass said:
Ying, I take it the small round filter is what you're referring to? Can you tell me where you bought it, what it's original application was? And what is the brass implement the large oil hose is attached to? Thank you !
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Mike,
The filter is just a small breather filter from K&N.The brass fitting is an IronJohn shut-off valve that shuts off power to my ignition.The breather line goes directly to the oil tank
 
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