Hi Machismo, I certainly feel your pain. I cant say that im an expert or that I've been able to eliminate the mayo; I'm not and I havent. But I'll share what I've done and my thinking (right or wrong i cant say):
1. I've kept the OEM catch can; I dont like oily spray or a mess under the bike.
2. Crank Case airline: Routed by HIGH over the frame and then back down to the can. Im using a clear hose I got from a hardware supplier so I can see what the f*** is going on.
3. I've blocked the timing chest line. The design of this is actually a drain from the can back into the timing chest. There is actually a duckbill in the timing chest that allows goo in, but doesnt allow goo or pressure out.
4. Left the primary case hose alone. It still goes to the can. I figure since I use nearly a liter of oil in the case, maybe a pressure relief is needed. Honestly, I've never check it... hmmmm
5. Where the Timing Chest hose used to connect to the can, I've installed about a 6 inch hose with a plumbers valve on it. This is my drain. It's also a clear hose so I can see when the mayo needs draining. Works great after a ride. I hide it behind the battery cover and then whip it out to drain the beast.
6. Air line from can to the air box. I've left this in place. My thinking is if the C Case breather system needs to maintain a negative pressure, i need a fresh air line into the can to allow the mayo goo to enter into the can and therefore dont want a sealed pressure vessel (PV=nRT - not that the can is really that 'air tight'). Basically, I want the CC hose to remain clear and the stuff needs to be able to enter into the can with the neg pressure created by the duckbill.
Is it really any different than stock? Well, no not really except running high. But I have a drain without have to disassemble the left side of the bike!
I still get mayo... especially when Im running short or hard. But i dont care... just drain the beast. Performance wise, Ive been running this way for over a year now. Havent seen any decrease in performance, but I also make sure my lines are clear and free.
As a suggestion: How about leaving your setup as is, with the air line open and not blocked? Just an idea.
Thanks a lot Dan. This ride means a lot to me and despite the hassles, I love it(and working on it) and do not want to go the UCE way - this motorcycle has way too much of character.
I agree with your suggestion of opening up the catch can-air filter line. Will do it today.
About #3 of your post: Crank Case airline: Routed by HIGH over the frame and then back down to the can.
Could you post a picture? In my case, the hose is a factory made one and its such a struggle to get it over the frame, behind the battery case. Far too little space, actually.
Also, that clear hose pipe of yours - can it withstand the high temperature? I kinda killed the thought of using the normal clear pipes, the last thing i want is a melted crank case hose pipe!
I like your system Dan and I agree with you about leaving the air vent line open.
When the engine is running there is a bit of "blowby" that passes the piston rings and enters the crankcase. Without some vent to the outside, this blowby has no place to go so it will pressurize the crankcase.
The added pressure will decrease the engines performance and can contribute to oil leaks thru the seals and flat gaskets.
You put in so few words and that's so very comprehensible!
Thanks Arizoni..
Do you feel like starting a new topic & laying out what's wrong & including the bike's present state; jets, state of tune, what you've done? Some history?
Thanks tooseevee. For now, I just want to fight this breather demon, hence did not start a new thread. Once a good set up is obtained, probably things may take a positive turn.
Will keep you posted.
Came early from work, am going to have the hot tube put back in the header since after about 6 months of riding without it, the low end torque has certainly gone for a toss - having done an upjet with #17.5 pilot to compensate for the change and the glass wool goldstar exhaust.
If I get any spare time, will also re-route the breather hoses today and see if it makes any difference.
Thanks a lot guys.