'17 FLHTK breather mod
Seasoned HDF Member
Joined: Jan 2006
Posts: 11,471
Likes: 2,998
From: Charleston, SC
He made a follow-up video explaining what they did so it would actually "vent". Of course he left that out of the first video...
Inside the trans case, they made a passage way in the wall between the two spaces so the engine could vent through the same hose as the trans. Ugly, stupid, and completely unnecessary.
Honestly I like Blockhead ok, but that whole video series should be taken down. So much bad information....
Inside the trans case, they made a passage way in the wall between the two spaces so the engine could vent through the same hose as the trans. Ugly, stupid, and completely unnecessary.
Honestly I like Blockhead ok, but that whole video series should be taken down. So much bad information....
Extreme HDF Member
Joined: Jan 2017
Posts: 10,790
Likes: 19,651
From: On the move
It appears that you watched this guy..
https://www.youtube.com/watch?v=Bq6LSZp0qMI
The guy really don't understand motors.. You have to vent the crankcase to the atmosphere, be it through the air cleaner or simply externally.. What the guy did was basically close off the crankcase.
.
https://www.youtube.com/watch?v=Bq6LSZp0qMI
The guy really don't understand motors.. You have to vent the crankcase to the atmosphere, be it through the air cleaner or simply externally.. What the guy did was basically close off the crankcase.
.
I run a half quart low with a vented dipstick and still get some oil in the AC. That's with keeping my oil level at about the half way mark between add and full.
Last edited by RET_SCPO; May 16, 2022 at 02:00 PM.
Extreme HDF Member
Joined: Jan 2017
Posts: 10,790
Likes: 19,651
From: On the move
He made a follow-up video explaining what they did so it would actually "vent". Of course he left that out of the first video...
Inside the trans case, they made a passage way in the wall between the two spaces so the engine could vent through the same hose as the trans. Ugly, stupid, and completely unnecessary.
Honestly I like Blockhead ok, but that whole video series should be taken down. So much bad information....
Inside the trans case, they made a passage way in the wall between the two spaces so the engine could vent through the same hose as the trans. Ugly, stupid, and completely unnecessary.
Honestly I like Blockhead ok, but that whole video series should be taken down. So much bad information....
Agreed they should edit that missing information in or take the video down.
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,893
Likes: 8,002
From: poway
I got the same idea as the OP after watching that video, it made sense initially to run the oil back as per the way the guy does it in the video so it goes back in the crank case and I think with the redesigned cover (gasket) on the later models it would work not resulting in the same issues the OP had. I'm going to vent to the ground like everyone else does. Just curious, but with a vented dipstick wouldn't this solve the issue of closing off the crank case?
I run a half quart low with a vented dipstick and still get some oil in the AC. That's with keeping my oil level at about the half way mark between add and full.
I run a half quart low with a vented dipstick and still get some oil in the AC. That's with keeping my oil level at about the half way mark between add and full.
If you are going to vent at the dipstick, why not simply plug the head vents? If you are going to vent at the tranny cover why not do the same?
FWIW the motor still needs some sort of one-way valve to reduce crankcase pressure..
Thread Starter
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Cruiser
Joined: Feb 2022
Posts: 104
Likes: 54
From: Salem Oregon
I found the second video and was not buying the fact they left out details. After watching the first one again I noticed when they were discussing the hose routing you can just see the notch in the transmission case. Im guessing they left that part out in fear of comments. Seems rather sketchy.
So, why not just notch the cover or add a hole in the webbing between the two cavities?
Jes
So, why not just notch the cover or add a hole in the webbing between the two cavities?
Jes
Extreme HDF Member
Joined: Jan 2017
Posts: 10,790
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From: On the move
Are you saying that with a vented dipstick you could just go ahead plug the breather bolts? If I'm already using a vented dipstick, which I am and I still get oil venting in the oil cleaner it makes more sense to me to keep the AC breather bolts vented and just have them vent outside the bike.
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,893
Likes: 8,002
From: poway
Are you saying that with a vented dipstick you could just go ahead plug the breather bolts? If I'm already using a vented dipstick, which I am and I still get oil venting in the oil cleaner it makes more sense to me to keep the AC breather bolts vented and just have them vent outside the bike.
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Seasoned HDF Member
Joined: Aug 2017
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From: Omaha,NE
Venting to the ground was not an option I wanted to pursue. I installed a catch can. All I ever got out of it was oily water. When I installed the SE Heavy Breather I left the venting as designed by HD and ditched any vent mods. They aren't needed. I really don't understand why people worry about this so much on modern bikes. There was a time it was beneficial, but that time has passed, IMHO.
Seasoned HDF Member
Joined: Jan 2006
Posts: 11,471
Likes: 2,998
From: Charleston, SC
Venting to the ground was not an option I wanted to pursue. I installed a catch can. All I ever got out of it was oily water. When I installed the SE Heavy Breather I left the venting as designed by HD and ditched any vent mods. They aren't needed. I really don't understand why people worry about this so much on modern bikes. There was a time it was beneficial, but that time has passed, IMHO.