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November 14th, 2014, 09:55 AM   #101
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So the crankcase vent hose ont the valve cover has to be connected with something to create vacuum on a 570???
I would like to eliminate that hose from spitting oil in my airbox...
I thought maybe guide a hose to the back side along the frame and make a reservoir before the rear schock where the hole is from swingarm it's not a big problem but the oil annoys me and my airfilter is always covered in oil (dna)
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November 15th, 2014, 03:33 AM   #102
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the 570 has a scavenge pump so the difference should not be as great as with the old engines

but yes you can add a high speed air valve to the breather, send it up the back of the bike and see if there is any outflow .. if there still is a bit a then a foam filter would be a good idea
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April 17th, 2017, 12:46 PM   #103
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Question Venting

Hey guys,

I just got my berg together again, and i cannot figure why its using oil.. Its mostly while i wheelie i have figured. I have blocked my rear vent and the frame, and fitted a one way valve in my breather mod routed to the swingarm overflow bottle. I have attached some pictures, also so you can see my finished berg project!

What do you think about the setup, is the hose too bent, or the valve too early in the line or?..

Engine is fairly new built with rings, valve seals etc..

I fill my oil up to about 1/3 of the oil glass, and after a single ride i refilled more than 200ml.. Then i had a commuting ride just low rpms and bike used almost nothing.. Its not like im revving the shit out of the bike, im really babying it..

I really hope you can help since solving this problem means alot to me..
Attached Thumbnails
Crankcase Venting 101-img_6037.jpg   Crankcase Venting 101-img_6036.jpg   Crankcase Venting 101-img_6035.jpg   Crankcase Venting 101-img_6034.jpg   Crankcase Venting 101-img_6019.jpg  

Crankcase Venting 101-img_6020.jpg  
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September 5th, 2017, 03:10 AM   #104
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Like the pics above I'm venting out and straight down as I can't go up due to the fuel tank sitting on top of the motor (supermono).
The check valve is always a bit greasy, oil and water mix, as I think on initial start up some oil is blown down the tube before a vacuum forms.
I have an extra vent through the oil filler if I added another through say the clutch cover? Crankcase? Could I seal off the forward rocker cover spigot (the rear spigot is sealed off on all my 'berg engines) using two check valves both pointing upwards?
Is this a really bad idea due to cam and rocker lubrication?
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