449/511 Breather hose mod

Looking at photos of Hermunen's old race bike, it looks like they chucked a bomb of an oil catch can on there during earlier races, seemed to disappear during later races;

http://husqvarna.newsletter.pleiadi.it/userfiles/Hermunen1.jpg

With that style of getup, would it drain back down the tube into the crank once the engine is off?

Noticed a few other things, there seems to be an extra large cutout over the rear shock chamber with something hiding in there (photo above). Something else which caught me eye was the circular looking thing on the left side next to the cylinder in these photos;
http://bmwmcmag.com/wp-content/uploads/2011/10/Superbike11-8257.jpg
http://farm7.staticflickr.com/6097/6289560696_1fc6674477_z.jpg
http://husqvarna.newsletter.pleiadi.it/userfiles/hermunen-supermoto.jpg
(Husky logo)
http://farm4.staticflickr.com/3497/5790231632_550898b6ed_o.jpg


Annoyingly the guys from Zupin said the intake snorkel on his bike is a factory bit so unobtanium!
http://farm3.staticflickr.com/2699/5790194436_4d1f6a494b_o.jpg

I know why they chucked that breather bottle, it doesn't work. Oil will not flow back into the engine through the breather port, it's a one way ticket. I don't know what that other thing is, I'll ask Ty. If I had to guess, it's an overflow bottle for the radiators.

Now ya mention it it does look like the radiator overflow.

Cool! Thanks Caiman

Little black hose is about the size of the rad overflow tube and is in the same location as the OEM tube. Looks a little more professional than my ghetto redbull can held on with cable ties haha. I've bought a motionpro coolant recovery thing but there's nowhere on the bike to really hide it out of harms way.

I got one of those PCV filter units and with a bit of extra hose and a custom joint I was able to mount the filter right beside the rad cap. Hopefully that will be enough hose and enough height to stop oil pissing out the top. Regardless the top portion of the tube is clear so I will be able to see if oil is collecting rather than flowing back into the crankcase. It was all pretty simple and inexpensive.

In a similar note, I swapped out a piece of clear tubing for the airbox drain. I also made it longer so it will hold more fluid. A short, black drain tube with a plug isn't all that useful.

I hope soon an affordable kit and/or simple sound solution is found. Until then I used a few ideas i found in many cafe husky posts.

I sealed up the left hole and glued a plastic hose I found on my bench in the other hole. Ones you buy for gas cap breather hose from the bike shops work great. Allows the oil to drain away from the top of the engine by diverting this oil under the bike. **Not A EPA approved design Be careful how you route this hose, I hit the exhaust once and melted the plastic tubing

https://plus.google.com/photos/1059...ms/5818113479534050209?authkey=CLj2oJ_A-KWzGg

Does anyone know what could cause the oil puking into the air box other than improper oil level? I have hot oil level of just above the bottom of sight glass but still alot of oil migration to the air box.

I see that some guys have problems and some dont. Are you riding a 449 or 511? I wonder if the amount of time on a motor would make a difference as to how much oil gets pushed into the airbox. ?????

The bikes that do not have this oil issue are running their oil levels too low. This is just a poor design by BMW and no breather bottle has been incorporated like on regular Huskys. If you run your oil level too low, then there is insufficient oil coverage on the torque limiter which will lead to failure. If you run the oil level at the capacity it was designed to be, then you must have a breather bottle to contain the blow by and return it to the crankcase.

Haha

My problem seems to be getting worse. I'll try the breather bottle, but I wonder if anything wrong in the engine could make the oil migration to the air box worse than it normally would be.

Where would one get a breather bottle?

Current breather bottles are prototypes. Not sure when Toxic's will be ready for release. My new breather bottle is totally different than before.

Jeff (Toxic) has been busy with things that pay the day to day bills so has't had much time to work on his breather tanks, either way, get in line I'm first! :P

It is smaller and stainless steel. Fits on right side of the engine with clearance for a megabomb header. All welded bungs and AN fittings instead of hose clamps. Still waiting on parts coming in to complete. I will post pictures when complete and installed.

I like it when Tinken is tinkering ;-)