Performance intake?
Advanced
Joined: Oct 2013
Posts: 98
Likes: 1
From: Southern CA
All the same though, the Arlen Ness intake is nice but the issue still remains with that intake, it routes the breather fumes/oil back into the intake through machined ports, its not ideal like DK was saying.
@DK- Quick question, a friend of mine has your AC setup on his 1200 EFI sportster and he is getting some oil coming out of his breather bolts that is dripping down the backside of his filter housing. Is this because he overfilled his oil? Should his oil only be filled to half way up on the dip stick to prevent this? In the past if you have had this issue with customers has there been an issue that has caused it most of the time?
Thank you!
Thank you!
Yes, we have about 5% of our Customers that have had problems with excessive blow-by. Almost all of them have resolved it by following the instructions for oil in the HD manual.
There are a variety of reasons a bike will have excessive oil carry-over (commonly referred to as blow-by).
There is a complete list at this link-
https://www.hdforums.com/forum/oil-r...f-my-bike.html
The most common reasons are incorrect oil viscosity for the ambient temps being ridden in, and oil level higher than it needs to be.
If you run your bike hard, there is always going to be a mist/film build-up on the back of the filter backplate, but it should never be so much that it drips.
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DKCustomProducts.com
DKCustomProducts.com
Outstanding HDF Member
Joined: Apr 2012
Posts: 2,938
Likes: 30
From: North Florida
Are you talking intake or air cleaner
Road Warrior
Joined: Oct 2012
Posts: 1,372
Likes: 49
From: In the foothills of southwestern NC - US of A
'Very simple to alleviate the problem if one were to think it needed remedy if running a K&N air charger; a vacuum cap over the return to the intake and a hose running from the u-tube on the intake to the ground. This will turn the horrible "stage .5" performance intake into that all powerful "stage 1.0" performance intake you so desire. LOL. Too funny. Most all open style intakes supply more air than the engines they're on can physically utilize on their best day, and here we are splitting hairs
=8^)
Advanced
Joined: Oct 2013
Posts: 98
Likes: 1
From: Southern CA
Right, PCV valves like the routing on the breathers we're talking about have blow-by and oil residue going into the combustion chambers for emission control, it burns all that **** up instead of releasing it out into the environment yada yada. Had we not had emission regulations the PCV valve wouldn't exist, it wasn't invented for performance gains just emission control. We're splitting hairs for sure, to each their own, I think this was a good convo about the topic though, lots of good info here. For me I would rather just have 2 things going in, fuel and air.
Grand HDF Member
Joined: Dec 2012
Posts: 3,782
Likes: 1,202
From: river
Here is my performance intake from hammer. I have a horse shoe running to a breather and a catch can. i use the catch can because i do get some blow buy. And i dont want it splattered on my bike. The cans are not mandatory at all, I just prefer one. You can also mount the crankcase breather about anywhere you want on the bike. I will be installing my dk customs breather bolts this winter so i can get rid of the horse shoe. If you are looking for performance, do not let the blow by go back into the carb.
the breather is also from dk customs. the contraption i made is pretty crude, but its what i had laying around my shop. smaller ones can be made and hide pretty easy.
the breather is also from dk customs. the contraption i made is pretty crude, but its what i had laying around my shop. smaller ones can be made and hide pretty easy.
Grand HDF Member
Joined: Dec 2012
Posts: 3,782
Likes: 1,202
From: river
I do split hairs with my performance. If i split a bunch of hairs it starts to add up. This is one simple thing one can start with if they are hp junkies like me. For your average Joe, they dont care and its really not that big of a deal to run the crap back into the bike. I will say this, if you run your bike hard you will have some blow by.
Cruiser
Joined: May 2013
Posts: 117
Likes: 0
From: Kentucky
I do split hairs with my performance. If i split a bunch of hairs it starts to add up. This is one simple thing one can start with if they are hp junkies like me. For your average Joe, they dont care and its really not that big of a deal to run the crap back into the bike. I will say this, if you run your bike hard you will have some blow by.
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Grand HDF Member
Joined: Dec 2012
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From: river
Let me pose this question: Do we know how much blow by is normal? I run a SE Heavy Breather on my '08 Nightster. I fill my bike half a quart low when I change the oil. By the time I reach 3,000 miles I need to add a half quart of oil. Keep in mind I do run my bike hard and frequently see highway speeds of 65+. So what is "normal?" Also, I know the bike isn't burning oil as in getting past the rings. NEVER have I had any signs of blue smoke.
i cant give you an answer on that. But when i used to ride more buell top end sporty to sturgis, about 700miles oneway. The girl would burn a lot of oil running around 4200 to 4500 rpms.
I dont think thats very much oil you are loosing. I dont think you are loosing all that oil threw blow buy. These bikes do use some oil when you ride them hard. Hell, i would have to put a full quart in on the one way 700 mile trip. i think you are good to go.
Cruiser
Joined: May 2013
Posts: 117
Likes: 0
From: Kentucky
i cant give you an answer on that. But when i used to ride more buell top end sporty to sturgis, about 700miles oneway. The girl would burn a lot of oil running around 4200 to 4500 rpms.
I dont think thats very much oil you are loosing. I dont think you are loosing all that oil threw blow buy. These bikes do use some oil when you ride them hard. Hell, i would have to put a full quart in on the one way 700 mile trip. i think you are good to go.
I dont think thats very much oil you are loosing. I dont think you are loosing all that oil threw blow buy. These bikes do use some oil when you ride them hard. Hell, i would have to put a full quart in on the one way 700 mile trip. i think you are good to go.