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Buell Forum » Old School Buell » Archive through May 07, 2011 » Do I really need a crankcase breather filter or catch can? « Previous Next »

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Michelangelo
Posted on Friday, April 22, 2011 - 09:42 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

On my 98 S1W it came with a ham can S2 airfilter setup. When I took it off to sell it I noticed it didn't have any hoses or anything connected to the crankcase breather spigots. I never had any problems with oil or crap blowing out.

Now that I'm installing a Hypecharger I wonder if I really still need one? Other than oil blowing out, is there any other good, reason to have something on the ends of the spigots or tubes? Currently I just have some tubing running off of each spigot down about 6 inches each.
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Two_seasons
Posted on Friday, April 22, 2011 - 11:06 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

If you don't want to end up chasing an oil leak that turns out to be only an oil breather drip and run, then put a catch can on your bike.

Al or Joanne at AmericanSportBike.com can get you the right set-up. And, they are a sponsor of this site.
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Blks1l
Posted on Friday, April 22, 2011 - 11:30 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I would at least hook them up to a hose, and run them to a filter to keep anything from getting in them. On my S1 I have the hoses looped to a T with a filter under the carb. It doesn't have a bit of blowby.
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Ft_bstrd
Posted on Saturday, April 23, 2011 - 12:25 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Mine blew a bunch of spooge out. I had to put one one just to keep the crap off my leg, foot, and engine case.
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Natexlh1000
Posted on Saturday, April 23, 2011 - 07:47 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I've been running mine with just a hose that leads to under the exhaust.
No more babysnot on my right shoe!

Don't be tempted to route the tube upwards to recapture the blow-by. The rockers have one-way umbrella valves so nothing would make it back inside the engine.
Besides, it's mostly water; you don't want that crap in your engine.
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Badsix2
Posted on Saturday, April 23, 2011 - 12:25 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

i know i'm going to take a lot of crap for this. but just get the mounting part that has fittings for the two hoses and your problem is solved. that little amount of moisture that gets suck in wont hurt anything. i have one on mine and have had no problems. jeees back in the 60s we use to inject water in our sb chevys with 13-1 pistons to keep the detonation down or at least we thought it did
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Ft_bstrd
Posted on Saturday, April 23, 2011 - 12:41 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I used the American Sport Bike banjo bolt kit to route mine down past the headers and have it routed into a catch can on the left side of the bike.

Oddly enough, I get less spooge routing it down than I did when I routed it up and over the engine.
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Buellistic
Posted on Saturday, April 23, 2011 - 02:22 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

All breather hoses should be run to a catch container(gas tank also !!!) ...

The most important breather hose to run to the catch container is the transmission breather hose for "SAFETY" because if you get oil on your rear tire you will understand why !!!

(Message edited by buellistic on April 23, 2011)
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Littlebuggles
Posted on Sunday, April 24, 2011 - 02:21 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Probably varies per the bike. I get a lot of crud through my breather lines, less since I installed XB upper rocker boxes, but still enough to warrant a catch can. I want to reroute down and between the cylinders and move my catch can, maybe to the right side of the bike, the left is getting pretty cluttered and I've not even got my remote res for the works shock placed yet.

If you don't collect much you may just consider routing down to the ground like many Asian bikes do with their breather lines (crank vent and battery vent lines). A drop here or there prolly won't put you in the hospital.
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Snowbees
Posted on Sunday, April 24, 2011 - 03:30 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

run the line into the muffler outlet, blows the crud away from the bike.
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