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Buell Forum » Knowledge Vault (tech, parts, apparel, & accessories topics) » Engine » Breathers (crankcase breathing system) » Archives » Archive through February 20, 2003 « Previous Next »

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Hootowl
Posted on Thursday, August 29, 2002 - 06:05 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Totway,
I have a similar setup, but I'm still using the stock X1 airbox (gutted or course). My breathers tee off downwards, tee again, one goes up to the airbox, the other goes down to a SS line which passes by the header, in front of the front pulley, and down into a catch can mounted next to the rear shock. I also have a PCV valve stuck on the end of the vent line. It's not there for horsepower, as we all know, but I figured if I can maintain some semblance of negative pressure in the crankcase, I might not puke so much oil. Seems to work pretty well as I have not had to drain the catch can since installing it four months ago. It may not be doing anything at all, but it makes me feel better. The whole set up is fairly invisible except for the SS line coming down. I'll post some pics of it later today.
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Totway
Posted on Thursday, August 29, 2002 - 06:25 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Hootowl,
I was doing something similar to yours before I changed the aircleaner. I connected the breathers with a filter inside the airbox and connected them again underneath the airbox with a line running to a can by the shock. I did put a filter on the breather line inside the airbox though.
Tim
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Hootowl
Posted on Thursday, August 29, 2002 - 07:19 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Here's the pics of my breather setup.
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Hootowl
Posted on Thursday, August 29, 2002 - 07:58 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

1
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Hootowl
Posted on Thursday, August 29, 2002 - 08:01 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Yes, that is an empty tomato paste can.
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Roadrunr
Posted on Thursday, August 29, 2002 - 09:46 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Hey hoot, I got the mini jaz for less than 50 bones! I was gonna do the tomato paste can when I saw yours, and then someone posted the jaz. Check it out next time your riding with us.
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Awprior
Posted on Thursday, August 29, 2002 - 10:17 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Where did you guys pick up the T fittings going out of the rocker box covers? I've got a set of the stock Harley banjo bolts and breather bushings, damn things leak like no other. If you can point me in the right direction, I'd appreciate it. I need ones that are 90 deg, not the straight stock ones.
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Hootowl
Posted on Thursday, August 29, 2002 - 11:55 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I got mine from MC Warehouse.com, but I'm sure ASB has something, or maybe even the local dealer or bike shop. They're made by Drag Specialties. I had a little trouble getting this part from them as they have discontinued this part number, replaced it with another that is a few dollars more and my order was delayed because no one called to ask me if I wanted them anyway.

http://www.mcwarehouse.com/newmikunicatalog.htm

Also, Custom Chrome sells their version.

http://www.legendmcs.com/Carburetors-Intakes/carburetors-carbs-mikuni.html
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Totway
Posted on Friday, August 30, 2002 - 12:25 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Actually I used the stock straight fitting and connected a t on each one with as short of tubing as possible. Essential each breather has an upper and lower connecting loop thus avoiding any "fluid plug". Worked fine.
Tim
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Hootowl
Posted on Friday, August 30, 2002 - 08:44 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I couldn't do that since I'm using the stock airbox. I tried, as that IS the ideal setup, but the plastic got in the way. This will work almost as well since it's all downhill to the can.
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Djkaplan
Posted on Friday, August 30, 2002 - 11:27 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Damn Hootowl, that's a pretty interesting system you fabricated.

I like the simplicity and the clean installation.

It's curious to see how everyone comes up with a different solution to the same problem. Some of the solutions seem pretty whacky, but they're all interesting.
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Hootowl
Posted on Friday, August 30, 2002 - 02:01 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Blake (or other admin)
Thanks for removing my failed picture posts.
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X1nut
Posted on Monday, September 02, 2002 - 01:37 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Has anyone tried routing the breather line(s) into the oil tank? I'd like to know if this would work.
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Ara
Posted on Monday, September 02, 2002 - 01:43 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

X1nut,
It would work...Badly. There's at least as much moisture in the breather gunk as there is oil, so what you'd accomplish is that you'd adulterate your motor oil with water. Venting to the open air or to a catchcan/filter setup would be much preferable.
Russ
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X1nut
Posted on Tuesday, September 03, 2002 - 10:22 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Ara
good point
thanx
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Aaron
Posted on Tuesday, September 03, 2002 - 10:46 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Breathing to the oil tank? The tank breathes to the engine which then breathes to the atmosphere or airbox. If you sent that back to the oil tank instead, you'd have a closed system. Guaranteed oil leaks and/or caps blowing off as the blow-by would have no place to go.
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Dart
Posted on Wednesday, September 25, 2002 - 11:49 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Has anyone tried this to cure the puking?
The Cure Vent Plus
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Apex1
Posted on Friday, October 11, 2002 - 11:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Didn't see anything here about rerouting the breathers on an XB. Anyone done it? What's the scoop?
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Pj1
Posted on Monday, February 03, 2003 - 12:51 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The breather bolts that came with my forcewinder do not screw all the way into the engine. Is this going to cause a problem or should I just leave the stock bolts in and route my hoses from them?
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Rick_A
Posted on Monday, February 03, 2003 - 06:44 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

It's not a problem at all. As long as there's enough threads to hold the carb retaining ring at its required torque it's fine. Make sure you use a thread sealant, too.
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Ricky
Posted on Wednesday, February 19, 2003 - 01:22 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I have been doing some tinkering in my mind. Has anyone tried to run the hose from the breathers on the heads back into the oil tank? I'm thinking of doing this to a sportster. What about venting of pressure? It already has a vent hose, yes?
Need opinions.
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Roadrunr
Posted on Wednesday, February 19, 2003 - 04:41 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

RICKY, Stop tinkering! Have you ever looked at that goo that comes out of your heads? It has water (or condensation) in it also That won't make your sporty very happy. Steve
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Ara
Posted on Wednesday, February 19, 2003 - 08:21 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Ricky, there are quite a number of solutions discussed in the archives to the Breathers section. Do a little research and avail yourself of the creativity and wisdom of the folks who have done the thinking and come up with solutions that work. Those solutions range from simply running a single or paired vent tubes downward to open air to small catch cans with breather filters. Whatever you decide to do, listen to Roadrunr. Returning the gunk from the breathers to the oil reservoir would be worse than pouring water into the reservoir.
Russ
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Ricky
Posted on Wednesday, February 19, 2003 - 12:04 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I knew I forgot something. That's why I asked the question. (note to self: get sleep before tinkering) I have been over and over the archives and yes, I am going to add the catch can on. I even picked up the breather manifold kit yesterday.
For those that need it, the P/N is 29281-91T. This covers '91 and later XL's.
Now I gotta find me the catch can.
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Blake
Posted on Wednesday, February 19, 2003 - 04:26 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Read Aaron's post above. You do NOT want to vent back to the engine. That would prevent any actual venting, the whole reason for the system in the first place. Kinda like plumbing your anus to vent back to your stomach. Not good!
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Roadrunr
Posted on Wednesday, February 19, 2003 - 06:44 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

yes Ricky, don't listen to me, listen to what Blake said. Oh pretty much the same thing? Sorry my bad!
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Blaster420
Posted on Wednesday, February 19, 2003 - 08:48 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Well I have started on my new catch can project I just need to make a trip to the hardware store and pick out some fittings and then put it all together.
catchcan1
catchcan2
What this is is a 4" length of 1.5" alum. conduit with some caps welded on it.
Ben
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Blaster420
Posted on Wednesday, February 19, 2003 - 08:59 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

That is going to replace the catch can that is on my bike now, it is a plastic can with a "T" on the top. The "T" is set up so that the liquid blows right over the can and still exits out the back. I am going to run a separate hose for in and out of the can and a small drain at the bottom. I know I could find a can ,but it is so much more fun to make. and I was getting paid to make it. (Love them slow days at work with full access to all the shop tools I could ever want.)
Ben
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Blaster420
Posted on Thursday, February 20, 2003 - 01:00 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Ok, I am a little closer now, just need to get the holes drilled (and get my bike back from the shop) then get some more hose.
catch can01
catchcan02
So far my bill is $14.64, but since I worked on this on the clock for 2 hours @ 15.75 hr I think I am still ahead of the game.
Ben
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Blaster420
Posted on Thursday, February 20, 2003 - 01:05 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Oh yeah and I have to polish some more, I think that will be another hour or so.
Ben
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