Jobe Zeebuh
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- Dec 12, 2010
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- 1,527
LOL! You are the only person that noticed that. Cool!
How-To: Crank Case Breather Mod (with pics)
- Thread starter Urban_Assault
- Start date
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LOL! You are the only person that noticed that. Cool!
murderland
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- Mar 23, 2011
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- 19
Can anyone explain to me how this works exactly?
Keeps the oil from being spit up into the air box, which in turn would be introduced back into the combustion chamber. Thus making it perform below par.
This mod is all about drive-ability and is a must do for XB models in my opinion.
This mod is all about drive-ability and is a must do for XB models in my opinion.
Hi all,
Been reading this topic several times.
What I understand as logical with my technical experience is that;
1. We want clear air to fill our engines. Nothing else.
2. We want as much air as possible. That is what makes K&N make money.
The normal setup is creating a minor vacuum in our air box. Which minimizes the amount of unburnt fuel in our engine box.
With a filter mounted, do we not eliminate this vacuum? Actually having more chance of these gasses to stay in the engine?
Isn¨t what we really want a reservoir which stops the dirt from entering back in the cylinders?
In other words.
Is there any proof of this setup improving our engine? Or are we just adding more air through an external filter?
It keeps me puzzled.
Been reading this topic several times.
What I understand as logical with my technical experience is that;
1. We want clear air to fill our engines. Nothing else.
2. We want as much air as possible. That is what makes K&N make money.
The normal setup is creating a minor vacuum in our air box. Which minimizes the amount of unburnt fuel in our engine box.
With a filter mounted, do we not eliminate this vacuum? Actually having more chance of these gasses to stay in the engine?
Isn¨t what we really want a reservoir which stops the dirt from entering back in the cylinders?
In other words.
Is there any proof of this setup improving our engine? Or are we just adding more air through an external filter?
It keeps me puzzled.
IMO, we have a winner.
The vacuum is needed to draw gasses out of the crankcase. A road draft will tube will work, but not as well. I can't imagine for a minute that the minute traces of gas being drawn out of the engine will put out the fire. I mean, look at water injection setups. Those are introducing a ton more non-combustible material into a cylinder.
The vacuum is needed to draw gasses out of the crankcase. A road draft will tube will work, but not as well. I can't imagine for a minute that the minute traces of gas being drawn out of the engine will put out the fire. I mean, look at water injection setups. Those are introducing a ton more non-combustible material into a cylinder.
Had this idea sketched up awhile ago and finally got the time at work to make it.
the inlet will be on the rear side of the oil cooler bracket and a brass muffler is the exit. I have a thumb screw with a o-ring on it for the drain at the base.
the inlet will be on the rear side of the oil cooler bracket and a brass muffler is the exit. I have a thumb screw with a o-ring on it for the drain at the base.
Thanks Vroom,
I will probably go for the drummer catchcan.
I will just use the catchcan in an extended tubing setup. Placing it in the lowest point. So the reservoir will collect the muck.
As any addition of filter would require a new ECM setup to adjust fuel-air ratio.
Just my 5 cents.
I will probably go for the drummer catchcan.
I will just use the catchcan in an extended tubing setup. Placing it in the lowest point. So the reservoir will collect the muck.
As any addition of filter would require a new ECM setup to adjust fuel-air ratio.
Just my 5 cents.
09buellxb12ss
Well-known member
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- Mar 7, 2010
- Messages
- 74
henri66
you can get that same catch can from american sport bike for $30 less. the only thing that i see different is the emblem is on on it.
you can get that same catch can from american sport bike for $30 less. the only thing that i see different is the emblem is on on it.
Leoallafila
Member
- Joined
- Apr 1, 2011
- Messages
- 13
I just bought all the stuff I will need and I read through the whole post. Took me an hour. I am pretty good with DYI so my thoughts are:
1) in many setups I've seen I can see the breather filter gets soaked in water in the case of direct rain/road spray
2) considering that, adding that oil and water will try to find the lowest spot (thank you gravity) while the fresh air from the breather can come in from every position, I am going to run the "main" hose towards the rear of the bike (I don't like to see all that rubber around my cilinders) + a little bit of piping from the T where the breather connects to it in an upward direction so that there is no way oil and water can run in that direction. This will also allow me to place the breather in a position where it will be protected by the elements. I will post pictures and shakedown impressions. My new Ully stuttered on me for the first time today and I did NOT like it.
1) in many setups I've seen I can see the breather filter gets soaked in water in the case of direct rain/road spray
2) considering that, adding that oil and water will try to find the lowest spot (thank you gravity) while the fresh air from the breather can come in from every position, I am going to run the "main" hose towards the rear of the bike (I don't like to see all that rubber around my cilinders) + a little bit of piping from the T where the breather connects to it in an upward direction so that there is no way oil and water can run in that direction. This will also allow me to place the breather in a position where it will be protected by the elements. I will post pictures and shakedown impressions. My new Ully stuttered on me for the first time today and I did NOT like it.
Leoallafila
Member
- Joined
- Apr 1, 2011
- Messages
- 13
Holy moly that was a GREAT mod. Before if I gave the bike a blip of the throttle she would just cough, now I get a revv happy response. A lot smoother power delivery at low revs and in general a much better attitude riding.
I ended up going to the front of the bike to install everything because I realized that there is not much space in the back of the Ully in the footrest area.
I separated the breather filter from the junction T quite a bit, hiding it behind the oil cooler so to protect it as much as possible from rain and roadspray. I also left a lot more pipe for water and oil to collect running it all the way back to the sidestand. I can simply undo the last ziptie from the pin it is attached to, drain it, and put it back. I know the white zipties are fugly but they'll do for now. If everything hold together I will put black ones instead. I made sure nothing moves or rubs and I also stayed clear of the fins of the cylinders as I think the rubber hose might melt on them even if it's supposed to withstand heat. No point in testing that if it can be avoided. All and all I like this setup because I can still point out the cool little breather filter, but it's not "IN YO FACE", there is less piping and I belive it works better this way. I'll update after this weekend where I am supposed to ride for the whole of Sunday, it's going to be a good test.
Pics:
slideshow of mods from top to bottom
I ended up going to the front of the bike to install everything because I realized that there is not much space in the back of the Ully in the footrest area.
I separated the breather filter from the junction T quite a bit, hiding it behind the oil cooler so to protect it as much as possible from rain and roadspray. I also left a lot more pipe for water and oil to collect running it all the way back to the sidestand. I can simply undo the last ziptie from the pin it is attached to, drain it, and put it back. I know the white zipties are fugly but they'll do for now. If everything hold together I will put black ones instead. I made sure nothing moves or rubs and I also stayed clear of the fins of the cylinders as I think the rubber hose might melt on them even if it's supposed to withstand heat. No point in testing that if it can be avoided. All and all I like this setup because I can still point out the cool little breather filter, but it's not "IN YO FACE", there is less piping and I belive it works better this way. I'll update after this weekend where I am supposed to ride for the whole of Sunday, it's going to be a good test.
Pics:
slideshow of mods from top to bottom
Leoallafila
Member
- Joined
- Apr 1, 2011
- Messages
- 13
somehow some of the pics got smushed... sorry
Just thought I would share my version of this mod/fix since it was inspired by this thread. 
I like the different custom catch can ideas you guys came up with. Like the NOS energy shot and a flashlight body.. brilliant! I figured one of these clear fuel filters would do the trick. Just plug the outlet with an 1/8" pipe plug and you have a visible $12 catch can. I got a "T" and "Y" depending on where I decide to mount it. Think I will drill out the inlet tube near the bottom so it fills better too. I will post up a photo after I mount it.
I like the different custom catch can ideas you guys came up with. Like the NOS energy shot and a flashlight body.. brilliant! I figured one of these clear fuel filters would do the trick. Just plug the outlet with an 1/8" pipe plug and you have a visible $12 catch can. I got a "T" and "Y" depending on where I decide to mount it. Think I will drill out the inlet tube near the bottom so it fills better too. I will post up a photo after I mount it.
