| Author | Message | ||
     Scot |
I put a devonator breather on my bike today. It's a beautiful piece of work. The finish is just like the rocker boxes and its lines mold well with the lines of the rocker boxes. All the old plumbing is gone and the rubber hose is out of site. Heres a link to the pix if interested. Scot http://pages.sbcglobal.net/ssandersons/_uimages/devonator1.jpg | ||
| Ara |
Scot, where does the liquid go with your Devonator installed? | ||
| Kahuna |
Ara, according to the X1-Files:
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| Johnnybravo |
one thing about the devonater the umbrella valve is one way so oil cant flow back into the oiling system. i now alot of people that have the devonater and it still pukes like crazy. now for my puke it isnt cumbustible, and it doesnt smell like oil so it isn't gas | ||
| Sem1 |
Ara: thank you again. I agree that not all or even a significant portion of the liquid I am getting from the breather is blow-by. However, I do theorize that there is just enough of unburned fuel in the blow-by to make the puke smell like gas -- it should not take much. Also, after reading the breather discussion, I understand that the blow-by is indirectly the reason for the puking. In order for the puke to come out of the breather there needs to be lots of vapor/gas being pushed out. Assuming functioning umbrella valves, the only way there should be lots of gasses coming out is if there is blow-by. So, I am suggesting that perhaps uncontrollable puking with slight smell of fuel is sometimes simply caused by poor piston ring seating rather than any particular breather setup or float bowl overflow. I am a newbie when it comes to motors, so I would love if someone could either confirm or dispute what I wrote above.  And hey, if it is poor piston ring seating, it would give me the perfect excuse for buying the Nallin 1250cc big bore kit.  Cheers, Semi | ||
| Scot |
Ara there is a place to hook a hose on the back side. Then in my case it goes to a catchcan. Johnny B,I wasnt aware that the devonator had an umbrella valve.It appears to be just a nice billet air channel with banjo bolts and a barbed hose connection in the back.Scot | ||
| Chrisg |
On the puke thread: I've been running a Jaz can on my M2 for near 30,000 miles, and consistantly get ~1 ounce of puke after longer spirited rides. It comes out a tan color, with a hint of green, sort of like the background color of this board. My highly unscientific conclusion has been that this is mostly just condensate (water) with a little blowby for color. This is based on the fact that my oil level stays constant regardless of pukage, and the fact that if I leave the puke sitting in a clear container overnight, it seperates into water with a thin film of gunk on top. My guess is that variances in puke volume between board members is based on humidity of the local climate, and the fact that catch cans provide a place for water vapor to condense, which would otherwise pass through the breather system as a gas. I suggest if you're concerned about it, let some puke settle out and see if it isn't mostly water. | ||
| Ara |
Due to past discussion in which Jose provided irrefutable proof that rockerbox design and gravity prevent liquids from returning to the engine once they've gone to the breathers, the Devonator design is suspect. They always show the thing arching up over the carb like an upside-down "U". That puts the hose barb at the top and that installation configuration will allow the gasses to escape, but where do the liquids go? They can't return to the motor and they can't escape the Devonator. I suggest that if you removed the Devonator you'd find it was retaining fluid. Not good. However, if you mounted it in reverse like a right-side-up "U", it would serve as an acceptable liquid/gas manifold and with a hose and a catch can would make a clean installation. It woud NOT, however, work better than a pair of breather hoses connected to the same catch can. The bottom line is that the Devonator does not do anything more than what a pair of short hoses connected in the middle with a T fitting would do. Their ad hype that it both "sucks and blows" is BS. Scot, there's no valve in the Devonator. You misunderstood Johnny. He was simply referring to the umbrella valves in the engine. Sem1: How many miles on your bike? I would guess that for any bike to puke as much as yours and for it to be caused by blow-by and ring seating, the engine must be low-mileage and not broken in yet. But if your engine has sufficient mileage to be adequately broken in, I'm at a loss to understand how your rings would allow such a high volume of blow-by and puke. Russ | ||
| Sem1 |
Ara: 10.000 miles. Could warped cylinders cause bad ring seating? (Now that would be the ticket to getting the Nallin kit!) Is there a way to measure how well the rings seat (i.e. how much there is blow-by)? Is that what the compression test measures? Chrisg: I will pay attention to possible water in puke the next time I go riding. (About one month from now.  ) Thanks!  Is there anything else that could cause variance in puke volume other than blow-by, climate and oil level? Cheers, Semi | ||
| Johnnybravo |
thank u ara, and i did let it settle overnight, and it is mostly water i think i was getting so much because the weather here has been 50 deg. one day and 20 deg. the next  its 30 right now but i still rode to work  thanks for all the help guys | ||
| Blake |
Semi: A leak-down test is what you are needing. A good tech will be able to tell where the leak is happening if you have one. The cause of your excessive pukage problem could be blowby caused by bad ring seal, yes. Johnny: The water is a product of combustion. If you are getting a LOT, your engine may suffer from poor ring seal and a leak-dwon test is warranted. | ||
| Johnnybravo |
Well i am going to replace the base gaskets tonight so i will just change the rings too | ||
| Blake |
Johnny: If your ring seal is the culprit, shouldn't you have your cylinders bored oversize or at least have them rehoned prior to replacing the rings? And, it would be very good to have a leakdown test done first, so that you know for sure where the problem is. Just replacing the rings seems like a hit or miss gesture. Why not be systematic and be sure you are attacking the true gremlin causing your pukage. | ||
| Johnnybravo |
well because i have to change the base gaskets so while i have the cylenders off i am going to replace the rings and honing the cylinder is always a must when u reasemble an engine riding season is to close for me to change the base then do a leak down then tear it apart again and change therings and another set of base gaskets  | ||
| Blake |
I follow you. I didn't realize the engine was already apart; was thinking you could do a leakdown test BEFORE changing base gaskets. Good luck; let us know what you find. | ||
| Johnc |
Johnny, I recommend that you have your cylinders measured for taper and out of round before honing for new rings. There are lots of case of out of round cylinders on these engine causing blow-by. Good luck! | ||
| Sem1 |
Blake: This message board is a treasure; thank you for the info! I will have the leakdown test done the next time I have a chance (not very soon, I am afraid). Cheers, Semi | ||
| Johnnybravo |
measred the cylider in 8 places and it was withind round so i rehoned re ringed regasketed and all i have to do is throw the rokerboxes on tonight and take her for a ride    | ||
| Ara |
Johnny, I'm dying to hear the results! Just remember that the initial pukage will probably not representative of what you can expect once it's broken in again and the rings are seated. Russ | ||
| Johnnybravo |
i figured that, i just think it was the weather going from one extreme to the next cause it smelled like fuel but wasnt flamable it was almost like carb cleane smells flamable but isn't and 90% of it was water so i will se tonight if it doesn't rain i will go on a much deserved ride  | ||
| Skulley |
About that devonator, keep an eye on the banjo bolts. They do work loose and disappear. | ||
| Scot |
I thread locked the banjo bolts in so hopefully I will avoid that scenario. I have had the devonator on for about 2 weeks now 400-500 miles and They havent leaked,seaped or weeped any oil yet.Keeping my fingers crossed. Scot | ||
| Kahuna |
Good day to all! I have re-routed my breathers all the way to the back of the bike. The hose is just behind the lic. plate (to the left) and pointing downwards.  I'm a little concerned since the hose seems to be in the path of the rear wheel. Will enough puke cause me to loose traction on the back wheel? Or is it such a small amount that it wouldn't make a difference? Thanks! | ||
| Ara |
Kahuna, if anything absolutely true has come from this segment of the BBS it's that pukage volume varies from bike to bike. It's the age-old answer, "It depends." | ||
| Johnnybravo |
Is it on a sharp incline? One of the techs at a dealer in Oconomowoc Wi warned me of this cause i had my tubes looped over. He said that it might get pluged and cause to much preasure in the cases.  just cause i like this pic! | ||
| Kahuna |
No ... I have an L fitting on it making it point down. | ||
| Ara |
Kahuna, if you can post a photo of the hose route and fittings used it would be appreciated. | ||
| Kahuna |
Ara, I'll snap some pics today and post laster. | ||
| Ccryder |
Kahuna: One way or another you should have a catch can on that breater. If you are looking for solutions take a gander at this airbox breather mods and catch can Even if I do say so myself it is a pretty clean solution. From 45K+ miles on a Buell, one time or another it will puke. Not a good idea to tempt fate when it could mean quick reduction of rear wheel traction. We all know about Murphy. Do you know O'Briens law? Murphy was an optimist  Ride more, Lean more, Grin more. Neil S. | ||
| Jasonl |
A friend did this a while back. He had some puke-age drip onto his rear brake which had the obvious effect of lubricating his rear brake pads. NOT GOOD. |
