When I change the air cleaner in spring, one of the choices is an NRHS unit. I can buy the horseshoe breather unit they have or get some breather bolts. What is the real difference? Does the breather bolt leave all kinds of gunk all over? Does the breather unit send it to the floor unless you have a catch can much or is it merely a spot here and there?
I've never seen breather bolts that didn't wind up leaving some oil residue on the side of the bike when it's run hard. On the other hand, a horseshoe breather without a filter trap will leave a drop or two on the garage floor.
The pic below shows a filter trap in the discharge line that I used to eliminate the occasional drops on the floor. But after getting tired of cleaning it, I eliminated it, and just wipe up the occasional drop of oil on the floor.
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Light travels faster than sound. This is why some people appear bright until you hear them speak. 04 1200C - Bub Jug Huggers - NRHS Hurricane Flow A/C - Daytona TC88A Ignition
I was afraid that like my Powerstroke, it will blow smoke out and leave drops on the floor but thinking back, it isn't diesel oil so it can't be that black and cause problems.
To me having hoses hanging is just plain ugly. I bought a bracket with integrated breathers for $80 on eBay. Looks really good and works really good as well.
To me having hoses hanging is just plain ugly. I bought a bracket with integrated breathers for $80 on eBay. Looks really good and works really good as well.
The problem with sending your breathers back into the combustion chamber is it robs horsepower (about 3-5 hp in our dyno testing) and it causes increased carbon buildup inside your combustion chambers. If you are trying to get every last hp capable of your bike, external breathers are the way to go. Put your hand over one of your breathers as the engine is running. The air coming out is extremely hot. Hot air inside your carb or throtlle body is not a good thing when trying to make power. The colder the air, the more power you make.
Has anybody ever ran external breathers with the SE intake? I think it could be done but a couple of holes would need to be drilled.
ETA: I think I'm going to try a pair of those Outlaw breather bolts DK Custom sells and see how it goes. It looks like they would be behind the back plate and not vent hot air/oil into the TB. Personally I don't like the look of anything hanging down below the AC.
__________________ 2010 XL1200C Sportster/Vivid Black/SE SP Pipes/SE Intake/Mustang Vintage Solo/Lick's solo bag/Küryakyn Cruise Bar/Progressive 440's/Progressive fork springs w/Ricor Intiminators & Amsoil 5W Shock Therapy/Dynojet Power Vision tuned on the street
Last edited by CanuckSporty; 02-10-2012 at 10:24 AM.
The problem with sending your breathers back into the combustion chamber is it robs horsepower (about 3-5 hp in our dyno testing) and it causes increased carbon buildup inside your combustion chambers. If you are trying to get every last hp capable of your bike, external breathers are the way to go. Put your hand over one of your breathers as the engine is running. The air coming out is extremely hot. Hot air inside your carb or throtlle body is not a good thing when trying to make power. The colder the air, the more power you make.
In your own opinion, would that be a reason why an engine would sputter a lot?
Breather unit vs Breather Bolts
