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once more STUPID venting issue

Joined Apr 2002
1K Posts | 3+
fallon nv
I know I know I am beating this dead horse but.......

2005 FE550, Tried the check valve that Dale recommended both in the stock boot and in a jumble of hoses and tee fittings. Still passed oil and I thought the problem was that I had nothing to catch the mist and let it turn to liquid again. And with just hoses with a piece of foam in the end like on my 2001 501. Problem the bike still pukes oil out the breather. What am I doing wrong?

I only put in 1 quart of oil, Even with the stock set up I was blowing major mist into the air box.

Bike runs strong, no weird noises, and starts like a wet dream. :D

I was wondering can a catch container ala the DRZ 400 be used to vent the case and then let the accumulation drain back into the case?

Is the entire case under the same pressure conditions? Is there a way to return the breather to the case? I dont think so but there are many out there smarter than me so just a thought.

HELP
:?
 
bump

bob

there is a small chance that the rings are still bedding in and that it will gradually stop blowing.

i always run my oil on the minimum at 900cc so that's another one to try.

the pressure is the same throughout the engine, however the higher the breathjer the less oil leaves the engine.

a question for dale this one.

regards

Taffy
 
if the above answer seems jibberish, its because i know better but im running my post count up!
:lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol:

Taf You may be right about the oil ammount. Whot knows, maybe I didnt get it all out when changing. Vent hose is at the handelbar. That is how I knew :twisted: :twisted: :twisted: Oil in me lap. Came home with stains in the crotch made the wifey wonder :twisted:
 
The 04's and up went to a double breather spigot rocker cover. I suspect this has something to do with it. The placement of the spigots must be so that oil is flung right out the holes as when I did a breather mod on my 05 it was a total disaster. Oil everywhere in copious amounts. I blew out so much oil that it overheated. Perhaps plugging up one spigot or going back to the 01-03 rocker cover will do the trick. Who wants to be the first to remove the breather hoses from the rocker arm cover, start the bike and see what the problem is?
 
husabutt said:
The 04's and up went to a double breather spigot rocker cover. I suspect this has something to do with it. The placement of the spigots must be so that oil is flung right out the holes as when I did a breather mod on my 05 it was a total disaster. Oil everywhere in copious amounts. I blew out so much oil that it overheated. Perhaps plugging up one spigot or going back to the 01-03 rocker cover will do the trick. Who wants to be the first to remove the breather hoses from the rocker arm cover, start the bike and see what the problem is?

Ok I was the stupid one to take off the hoses and see. 8O

The vent to the rear must be over a oil feed or the cam chain is flinging a lot of oil cause it comes out like from the end of a punp! I had a hose on it that was 16" long and it sprayed oil out the end.

First try to fix. I made two canisters out of 1 1/4 pvc with barbed ends and some of the corse foam like in the stock breather to catch the mist and let it return to liquid. It worked MUCH better but still pumped oil out the rear breather at high rpm and with the hose just above the radiator. I think the key here is volume in the catch area if you are going to run both vents but you are limited in space. Next try was to block off the rear vent and just use the canister on the front vent. WALA :D so far so good. Full throttle and you get some mist still but nothing to cry about. Besides I cant go WFO for very long.

I will take it on a 250 mile test next weekend and let you know . If it works I will take some photos and let you see it. I talked to Takis and he is only running the front breather on his Supermoto and I think he spends much more time WFO than me and he has not had any problems. If this works I will probably make the canister out of Aluminum and put an angled end on it for better hose routing.

If any one sees or knows a reason that I should have both vents PLEASE let me know. What is the factory doing about this problem? Fryguy? I know that I was spewing oil into the airbox with the stock setup. That cant be good. But.................. if this and the lack of a big gas tank are the biggest problems on the 05 06 bergs



NO PROBLEMO
:D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D
 
I also tried running one hose up & back to the chain like someone suggested. Disaster! LOTS of oil on the chain, had to clean the right side of the bike after that ride! Put the stock setup back on & installed a Krankvent in the fitting to the backbone. May be getting some oil mist into backbone, but oil level doesn't drop now.
 
Yes, the 1/2" with barbs, put it into the short nipple on the backbone under the original "stuff". Since it's just hanging down from the backbone into the original piece, I didn't need the bottom barb, sawed it off so it wouldn't be jammed into the "brillo" material.
 
Hi all,with regard to the venting issue i recently changed the engine in our sidecar from an 03 model to an 06,changed due to big end bearing failure smashing everything within site of next year,but anyway the venting breather set up on the 03 worked superbly (chrysler one way valve,one hose to a filter) but said system on 06 engine was a waste of time and pints of oil.Found through trial and error that the best solution was to blank off the rear vent and install the vent hose leading as high as possible before dropping down between the swingarm and shock.As soon as this was done no oil has left the engine and the engine now has 10 hours of hard work with perfect running.
Hope this might help a bit,cheers Ian.
 
This is probably a dumb question but then thats never bothered me before :D Firstly,I've had no issues with mine that I'm aware of but I've read quite a bit on here about this.It seems to me that if the vent sizes were doubled from previous years there must be a reason behind it.I don't know the port sizes so I'm obviously not sure of the total area.When blocking off one vent are there any performance losses or internal pressure increases at higher RPM's.A friend of mine had a KLX400 a number of years ago and one of the Larry Roessler mods was to increase the vent size as the stock size was deemed to small and apparently cost performance.Is any of this an issue or am I way off here?Thanks

AF
 
I think that's one of the reasons Dale recommends the one-valve is to lower the pressure in the crankcase, also the theory behind the KrankVent valve. Does the same thing, blocks the piston from drawing air back in, can just push it out. I put a gauge on the KTM I had & it actually caused the crankcase to run under a slight vacuum.
 
rancheroracer said:
I think that's one of the reasons Dale recommends the one-valve is to lower the pressure in the crankcase, also the theory behind the KrankVent valve. Does the same thing, blocks the piston from drawing air back in, can just push it out. I put a gauge on the KTM I had & it actually caused the crankcase to run under a slight vacuum.

I have been a student of Lineaweaver Husaberg Performance Theory and Practical Application for three years now (maybe someday I will turn pro :lol: ) and yes the basic premise is that crankcase vacuum will increase horsepower. For most trail riders though the reason to vent the breather is to keep oil out of the carb and frame backbone as it bothers some of us. It is not a mandatory modification and the stock set up works fine unless you flip the bike over then the cylinder will fill with oil causing much grief when you try to restart it.
 
[

I have been a student of Lineaweaver Husaberg Performance Theory and Practical Application for three years now (maybe someday I will turn pro :lol: ) and yes the basic premise is that crankcase vacuum will increase horsepower. For most trail riders though the reason to vent the breather is to keep oil out of the carb and frame backbone as it bothers some of us. It is not a mandatory modification and the stock set up works fine unless you flip the bike over then the cylinder will fill with oil causing much grief when you try to restart it.[/quote]

I agree, I did it for that reason & to minimize possible oil leaks, I don't think I could tell if it helped performance.
 
Mine was blowing oil into the airbox at high rpm with exactly one liter of oil in it. After speaking to Brett and lowering the oil to just under 1/3 up the sight glass (from 1/2 way), problem solved. It was tested before and at WFO on the banks at Homestead Miami Speedway :)

My curiosity is going to cause me to start messing with breather systems anyway, though... :roll: :D
 
Look in my gallery and also see if Takis still has his up. Mine has no more problem so far and the added benifit of the way I did mine is you get about 6 inches more height when the bike is on its left side. Remember you have almost no problem spilling oil when the bike is laying on its right side because of the breather is on the left but on its left side .... well you get the point. With the little amount of oil the motor holds I want to have as much as I can without doing dammage by overfilling. I think you will find that just by blocking off the rear vent tube( accident at the factory I have been told) you almost eleminate the slinging of too much oil into the breather. With the rear breather hooked up and 1 qt of oil mine spit oil out a 3/4" hose that was 12' above the handelbar. Lotta preasure. I think you will find the guys that are supermoto and street racing the berg's are doing a mod simalar to mine. I even say one that rean the vent hose into a catch bottle and drained the bottle into the fill hole.
 
Ok I was the stupid one to take off the hoses and see.

The vent to the rear must be over a oil feed or the cam chain is flinging a lot of oil cause it comes out like from the end of a punp! I had a hose on it that was 16" long and it sprayed oil out the end.
It was not stupid, now we know that the oil flung from the chain is not just a few drops now and then. I think this phenomenon was one of hedlunds secrets passed to husqvarna, inherited by husaberg and probably totally missed by ktm.
With the rear breather hooked up and 1 qt of oil mine spit oil out a 3/4" hose that was 12' above the handelbar. Lotta preasure.
Yes, a lot of oil pumped out of the rear breather tube, but if you block it, all that oil that otherwise would have been running down the other breather tube won't. Would that not cause less oil flow to the valve train? Is the rear breather there by chance and they had to cover it somehow or is there a thought behind it? Like for the purpose of passing lots of oil to the valve train or something?
 
I think the extra breather was a mistake.... I have it from a certain Racing legend ( from overseas not the D miester) that the factory told him that.
The location of the rear breather is directly over the chain wheel for the cam. You all know about centrifical force when a chain is saturated with oil............. FLING!!!!!!!!!
That is the sorce of the volume and distance that the oil will be pushed up. I really dont show any wear that could be from lack of oiling in the top end and I am now around 100 hrs.

I think you can gain the same benifit by blocking off the rear hole and running a hose up to the top of the frame tube and then back down to the bottonm frame rail next to the radiator overlow with out the check valve. That is the northern boys soultion and you all know Fry and his gang know their stuff.

I did not do the mod to make more horsepower, or to keep my airbox from getting a film of oil. I did it because I am a mere mortal and when you fall and go upside down( yes I have dont that at least 2 times in my carrreer) the carb fills with oil if you dont jump up faster than liquid can flow. I went from First place with almost 1 minute lead to waaaaay back in the pack after a over the bars experience in the new years day race in 2001. Lesson learned!
 
i use a single WR400 breather pipe that neatly fits on the single breather vent and goes over the engine, down to the right of the carb and stops ontop of the chain just about 1" behind the counter sprocket.

regards

Taffy
 
The location of the rear breather is directly over the chain wheel for the cam. You all know about centrifical force when a chain is saturated with oil............. FLING!!!!!!!!!
Yes, you all know that. The Husaberg guys simply must have known it too. The extra breather is not there by chance. The placement is not by chance either, they wanted an oil vulcano and they got it. But they also put oil lines on some year builds to improve top end lubrication. And then had the balls to remove them on later years models. You can say it was by mistake that they put the oil line there and you can say that it was by mistake they made the oil spewing breather. I'd rather use the word unfortunate, especially if it didn't do anything positive for the valve train longevity. Unfortunate acts of desperation rather than "oops, we got an extra breather, how clumsy of me, darn, I've mislaid my eraser, where is it now...".

The logics with the breather hose directed to the chain are really funny. If something goes wrong in the engine, reed blows or the piston, you get less unhappy since at least the chain got well oiled. Same thing if you end up upside down. Like Taffys, but a Royal Enfield one, my breather is in total vain directed to the chain, it never sheds a drop, unless something goes wrong. Apart from the chain lube vanity, it is a lot like Fry's installation. It might take a Royal Enfield to make it work.
 
I get really worried about the number of times I'm reading about reducing the amount of oil in the engine and the number of times it is in fact being recommended.

I had a number of seasons racing supermoto and using my motard on road race circuits where I was plagued by engine failures that after a huge amount of investigation led to the conclusion they were lubrication related failures and since ADDING to the oil quatity I carry in the engine I have resolved this.

I found out that Mr. Lineaweaver does the same.

I therefore recommend, especially to anyone riding on the highway, for long periods or for supermoto, that you add about 200cc of oil to the one liter.

Contrary to popular opinion, providing your engine is serviced well enough, it does not cause oil to spew out all over the place or into the carb.

If you are experience a lot of oil coming out of the breather whether into the carb. or through a breather tube, the first place I would look is to the reed valve located at the bottom of the crank cases behind the clutch. It very easily gets small pieces behind it, or is just bends over time and it is easy to replace.

As for the extra breather, the general consensus a few years ago by those who were getting big power from the 650 engines in supermono and supermoto was that the crank was pressurising and therefore needed extra breathing capacity. There were too many people talking about this for it to be simply rumour, but who knows. However, you can still get a happy 65 horsepower without problems with one breather so in most cases it really isn't an issue and therefore blanking one of the spigots of probably won't be a problem either.

Cheers,
Simon
 

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