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Why Does My Brand New Berg Burn Oil?

Joined Feb 2007
166 Posts | 0+
B.C., Canada
Good day to ya,

I bought a brand new, in the crate 2007 FE550 last fall. It now has 30hrs on it. Since day one it has burnt oil during cold engine starts. Never when the engine is warm, only when it is completely cold and has sat for 4 hours or so. At first I thought it was rings seating? But that made no sense, then it would burn oil all the time. Then I found out about the engine breather issue. I kept monitoring my airbox, sure enough there was always a film of oil on the boot to the carb. So I proceeded to fix the breather issue with the one-way check valve and routing it away from the airbox. So no more oil in the airbox but........ IT STILL BURNS OIL!!!! :evil:

I figure it must be a bad valve guide seal. But it never burns oil on deceleration or any other time. Only on cold starts. It clears up within a minute.

Now I know without a doubt it's oil being burnt- the cloud is blue-ish and it smells like oil. It's not condensation in my exhaust system.

One last bit of info- I have never noticed my oil level dropping in the crank due to engine consumption. But I know that it only takes a few drops to make a nice blue cloud.

Can anyone confirm that this sounds like a valve guide seal before I tear my motor apart and my hair out?

Thanks in advance,
Aaron.
 
It sounds like a valve guide/seal issue. You may try pulling the carb and exhaust headers,to try and observe oil leaking on the valve stems. I have never tried this myself, so I'm not so sure how well it would work. I would want some conclusive evidence before disassembly.
 
sorry this is a reply to the guy with the new bike smoking

Oil control is by a reed valve not so much by the piston rings as in older bikes. When your motor sets for some time the oil leaks thru the reed valve from the trans area into the crank area. So upon your next startup it takes time to push out the oil back into the trans area.Next time you change the oil pull the left cover off and remove the reed valve and see if a bunch of oil is behind it.And once you have done that put the reed back in only turn it over to try and make it seal up.It is not a very good seal but once running it works well.
 
My 03 FE400 does similar but I figure it's only on a cold start and is not consuming oil as such then leave it alone as it no major concern. I would suggest valve seals as there is no other place it can seep down from.
 
Danielson said:
My 03 FE400 does similar but I figure it's only on a cold start and is not consuming oil as such then leave it alone as it no major concern. I would suggest valve seals as there is no other place it can seep down from.


I agree it's not a major concern. However, when I purchased it brand new i expected everything to be proper. Another concern I have is resale. Eventually I am gonna have to fix the problem if I sell the bike down the road.

I feel like a tool every time I'm riding in a group and people see this new $9000 Husaberg burning oil. Not very good advertising for the brand either.
 
Coronaberg,

I saw your post regarding the reed valve. Not sure I follow how the oil gets into the combustion chamber because of a poorly sealing reed valve. Can you elaborate?
thanks,
Aaron
 
This is a quote from coronaberg.
"Oil control is by a reed valve not so much by the piston rings as in older bikes. When your motor sets for some time the oil leaks thru the reed valve from the trans area into the crank area. So upon your next startup it takes time to push out the oil back into the trans area.Next time you change the oil pull the left cover off and remove the reed valve and see if a bunch of oil is behind it.And once you have done that put the reed back in only turn it over to try and make it seal up.It is not a very good seal but once running it works well."

I guess it's a possibility. Usually they will smoke all of the time when the reed is not sealing, but I could see it happening as he suggests.
 
ahoolsema
how much oil do you put in the eng? if you over fill berg eng. tend to purge them self
via the breather system
what kind of viscosity are you using a thicker oil tend over oil the head when cold and it
would be worse when ambient temp is low

VIKING
 
Mine only smokes when given a rev for the first minute or 2 and yes only fill the oil to about 1/4 of the way up the iol window or less.
 
Oil height

Ahoolseme
Answer to your?
Look at your oil level in your motor setting on the kickstand or level and just think of all that oil in the crankcase! When the motor is running it has little to no oil in there only supplied buy the oil jet which the oil rings can scrape off with no problem.If it is half full it will have to run a few min to push the oil out of the reed.
 
Oil level

I put 1 1/2 quart in mine since new every oil change. Just lean to the right and fill her up no problems. No oil pucking breather always dry and I mean dry on both 501 and 600.
 
RE: Oil level

Aaron

Coronaberg has a good point, if the crankcase wetsumps, it will burn excessive oil until it pumps the case empty. I have seen this on various bergs in recent years, including the factory riders bike this last summer, although its not an oil cloud that will clear a pit area, it is noticable if you are watching the exhaust. If your motor had 100 hrs on it, I'd perhaps be concerned that you had internal issues, but at 30 hrs, its barely broken in, and if it never had a really good hard work out, that is very unlikely.

That being said, if it smokes enough to clear every bug out of the lower mainland, I'd follow Coronaberg's advice and check the reed or get a leak down test.


fry
 
To clarify a few things,
1) I fill the oil as per the manual. Oil level a 1/3rd of the way up from bottom when cold. When hot its a 2/3rd's of the way to the top. Roughly 900ml per oil change(no filter).

2)My breather system no longer feeds from the valve cover to the airbox. Instead it's routed via check valve to atmosphere. So no oil from the breather is entering the engine.

3) The smoke is not at "bug-control" level. But it is bad enough to be a nuisance. I'm gonna take a video of it tommorow and post it up.

4) So the excess oil in the crankcase gets up past the piston rings on cold starts? But once the motor start pumping, the oil is eventually purged out of there and fed back in via the oil jet? That makes sense to me. Thanks CoronaBerg.

to be continued...
Aaron.
 
My 08 FE450 does it a little bit as does my 07 TC250F Husky. I wouldnt get that alarmed about it.

Once both bikes get warm, the blue smoke goes away.
 
One of the early technologies that allowed Husaberg to make horsepower was that they used a 'two stroke' style crankcase. In otherwords it is completely sealed from the transmission and the oil pool, except for the passage way beneath the primary nut which is sealed by the reed. When the piston is moving downward, the pressure beneath the piston pushes oil that is puddled in the bottom of the crankcase out the reed. As the piston strokes upward, it creates a negative pressure it the case and pulls the reed closed, stopping the oil from migrating back into the case. The jet is located in teh top of the cases, just beneath the piston. It is fed by pressurized oil from the pump, and lubricates the wrist pin and small end of the rod. What happens when the bike sits, is that oil makes its way, slowly, by the reed, partially filling the case with oil. When you initially start the bike, this puddle of oil is splashed onto the cyl wall, and with the two ring piston, some oil manages to get by and is burned.

Lets hope this is all is happening to you. It seems that a lot of KTM product has the same smoke on start up. I can feel your frustration though, it doesn't sound like the bike shows signs of having huge issues, but still exhibits something out of the norm.

I'm anxious to see your video
 
I'm sure this is not worth much; my sons 03FE400E had a slight burnt oil smell from the exhaust for almost a full riding season after I bought it new. I feel with synthetic oil in from birth it just took a long time for the rings to seat properly? Who knows just go riding!
 
Didn't have time to get the video today. But I'm going for a ride tommorow so I'll post the video tommorow night!
 
Well,well,well. This morning I went out to my stone cold berg, camera in hand. Checked the oil level,looked good. I just did an oil change, set the level lower than I usually do(usually set to my manual specs). By lower I mean according to the new Husaberg service bulletin that DaleEO posted up. Sure enough- NO SMOKE!!! 8O This is the first time every that it started cold, no smoke. I'm guessing my oil level was just high enough to overcome the reed valve and overfill the crankcase. I'll see how it does tommorow and update.
So far so good.
ps- The last oil change I put in roughly 750ml oil, no filter change. Usually it's 850-900ml.
Aaron.
 

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