How-To: Crank Case Breather Mod (with pics)

[zaxrex]

Figured I'd post a pic of mine... $9 compressor water separator "catch can" from Lowes. Had to do some modification -- drill holes in the inside, but it works like a charm!

 

[pamver]

how do i get the lower peace of the ori airbox off the frame?

 

[tomworthing]

I modeled my setup after Shatrat's except I ran the lines on the opposite side (not the "show" side). I agree with him, the more hidden the better. I've had no trouble with oil or moisture under the seat and I drain after every other wash or so. I'm glad I'm not buring that sludge and it did seem to smooth it out slightly.

I can't see the point of running a filter with an open drain as it seems the air would follow the path of least resistance... up the drain tube rather than through the filter. Thoughts?

 

[McMurphy]

Finished mine 2 weeks ago. Ran it down with the vent line from the fuel tank. Put the filter on, and put a drain cock in the end.

Get a little bit of oily residue if I open it and stick my finger on the end, but thats it. Also noticed it running alot smoother at lower RPMs.

 

[EZRider]

Could a person use fuel vapor hose instead of transmission oil cooler hose for this type of application? I understand the transmission oil cooler hose can withstand higher temperatures (~300F as opposed to ~250F) and higher pressures then the fuel vapor hose, but it doesn't appear there will be a large amount of hot oil running through this hose...

 

[McMurphy]

Anyone else noticing a lot of smoke coming out of their filter when idling? As it's mounted behind my left leg I can't really get a good view while riding to see if it's doing it then, but seems like it would be?

 

[djmiller574]

Thanks for everyone who posted this MOD. Just finished mine. Runs much smoother under 3,000 RPM.

 

[EZRider]

Just did the modification yesterday. Worked out great for me. Noticed a difference almost instantaneously.

 

[Dynasty]

Great thread.

I have read it, but I am still a bit confused. I am trying to buy all the right parts and I want to double check. Here is what I am going to order thus far.
http://www.amazon.com/gp/product/B00030CZWI/ref=ox_sc_act_title_1?ie=UTF8&m=A2N6NO8W19JCUN
http://www.amazon.com/gp/product/B001HWGMBG/ref=ox_sc_act_title_2?ie=UTF8&m=ATVPDKIKX0DER
http://www.amazon.com/gp/product/B00062YO4A/ref=ox_sc_act_title_3?ie=UTF8&m=ATVPDKIKX0DER
http://www.amazon.com/gp/product/B004XONNTE/ref=ox_sc_act_title_4?ie=UTF8&m=ATVPDKIKX0DER

So my questions are the following-

1.) Does that look ok?

2.) I am missing the drain cock. The only thing is, I really want a catch can, so do I still need that? And better yet, where can I get a nice catch can that mounts to the front like that?

Thanks guys.

 

[djmiller574]

parts look right, probably save money if go to auto parts store...autozone/advance/etc. I got my catch container at Walgreens.....energy drink that had a black container

 

[Dynasty]

Thanks.

Unfortunately Manhattan is not the greatest place to find car or auto parts. This sadly might be the cheapest way.

Anyway, maybe I can to convince Johny to make me a catch can. Looks great!

 

[readysetgo]

I made a quick little video of my first time doing the mod. Hope this helps out a bit.
http://youtu.be/1SN_Ny3LQUY

 

[Baal]

Could a person use fuel vapor hose instead of transmission oil cooler hose for this type of application?

I suspect that the reason to use the higher heat rated hose is due to the trapped heat between the airbox and the rocker boxes. The existing hose has the open mesh wrap on it, which I assume was there both for additional heat protection and abrasion protection. HTH.

 

[Kuntreeboy]

[up]

 

[Dynasty]

So I just finished mine up.

Granted I have only rode 12 miles or so, but I don't notice much of a difference. Still bucking and surging at low speeds.

Anyone notice an immediate difference or did it really wake up after the ecm learned? Maybe I am still in that learning curve?

 

[GOduc]

Bucking and surging? Ellaborate.

 

[Dynasty]

It only happens when I am coasting from 1k to 1.8k rpms. The bike literally lunges back and forth. It really is like I am riding a bronco that only kicks front and back, not side to side.

You could also describe it as a coughing maybe.

 

[uly luigi]

just too low in the revs for any load, you are basically idling and feeling the individual firing of the plugs, pick the revs up a little, anything below 2k and not riding the clutch is ruff on the motor and tranny, stop doing that

 

[Dynasty]

All Buells do this? I kind of figured that is what got cured by this mod.

 

[joegriff1996]

Is there any problem with mounting the filter inside the air scoop? Would that be too much positive air? Has only had any oil come out of the breather filter. I noticed a small stain under bike. Thanks