Go Back   Husaberg Forum > Mechanical and Technical > Mechanical

Mechanical Mechanical Forum - spinning bits and gyrating bobs

Thanks Tree6Thanks
LinkBack Thread Tools Display Modes
November 14th, 2014, 10:55 AM   #101
Senior Member
Joined: Oct 2012
From: Belgium brugge

Posts: 716
Thanks: 170

I Ride: bikes
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)
HusaBELGfs570 is offline  
November 15th, 2014, 04:33 AM   #102
Senior Member
bushmechanic's Avatar
Joined: Jun 2007
From: south east WA Australia

Posts: 3,871
Thanks: 1223

I Ride: 2008 700FK, 2002 628FST
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
bushmechanic is offline  
April 17th, 2017, 01:46 PM   #103
Junior Member
Joined: Apr 2015
From: Copenhagen

Posts: 29
Thanks: 8

I Ride:
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  
badsted is offline  
September 5th, 2017, 04:10 AM   #104
Senior Member
canolman's Avatar
Joined: Sep 2013
From: canolbarth cymru

Posts: 366
Thanks: 210

I Ride:
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?
canolman is offline  
October 22nd, 2020, 10:59 AM   #105
Senior Member
thorgan's Avatar
Joined: May 2005
From: Sacramento California

Posts: 187
Thanks: 142

I Ride: "2000" FE600, 1994 FC660, 1994 FE501 (in pieces), 2001 FE 501 (in fewer pieces), 2002 FE 400
Hey Mr. Bushmechanic, I'm curious about your double-reed-valve engines.

I have a 2005 450 engine that I'm refreshing and I noticed the 2nd hole up in front of the counterbalancer shaft. What do you suppose would happen if that hole were to be simply plugged? There's plenty of thickness there to accept a pipe thread and a plug. I expect that this shouldn't be any different than the earlier engines in function.

I have a '94 vintage 600 engine that Thumper Racing bored out to use a 100mm piston. They also converted it to a wet stator so there's only a single crank seal now and all of the pressure from the 84mm stroke is pushing past the single factory reed valve. I have not noticed any detrimental effects on the left side crank seal from the vacuum either.

I'm also thinking about manufacturing a tube that directs oil, via the rear vent above the ascending cam chain, over to the rockers (maybe I'll split the flow and try to get oil directly onto the cam follower bearings via a pair of small holes in the rocker cover).

Any thoughts on these modifications?
thorgan is offline  
October 25th, 2020, 07:46 AM   #106
Senior Member
bushmechanic's Avatar
Joined: Jun 2007
From: south east WA Australia

Posts: 3,871
Thanks: 1223

I Ride: 2008 700FK, 2002 628FST
Hi there Thorgan, I think all those ideas are fantastic, I didn't simply block off the second hole because I figured it was necessary for something. Perhaps not. In any case redirecting the mist up to the cam followers is a great idea.

Would love to see some pictures of the oil lines to do that
Cheers !
Thanks from thorgan
bushmechanic is offline  

  Husaberg Forum > Mechanical and Technical > Mechanical

101, crankcase, venting

Thread Tools
Display Modes

Similar Threads
Thread Thread Starter Forum Replies Last Post
Opinions on 501 crankcase venting mod ajw30 Mechanical 7 April 24th, 2011 03:56 PM
470 crankcase johnsmith Mechanical 10 November 28th, 2007 12:38 PM
once more STUPID venting issue Bobzilla Mechanical 19 June 17th, 2007 04:25 AM
Oil Venting Through the Air Filter baja_racer Mechanical 3 February 28th, 2006 01:50 AM
Crank Case Venting Rideguy Husaberg 12 December 3rd, 2004 03:19 PM

Facebook Twitter Google+ RSS Feed