Author Topic: Café for a k1100  (Read 3926 times)

Offline boardjnky4

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Re: Café for a k1100
« Reply #50 on: February 25, 2019, 03:59:12 PM »
Anyone else has put pod filters on a k1100?
Someone must had to deal with this issue before, i cant find any more info?
I’ll give it a shot, pay close attention and see if i get sludges  in the throttle body.
From what i can see, it must be mostly fumes coming out of the crankcase beather hose.
Beeing mixted withe fuel/air mixture, i belive thath the system will compensate.
Anyway what do i know, îm just a basement moto mechanic triyng to undo what a bunch of verry well paid German engeineers worked hard to achieve! [ Invalid Attachment ]
Îll give it a shot, will keep posted next summer. I can always go back to the original aibox if all else fail.

The "accumulator" in the stock airbox is essentially an oil catch can. So, ideally, you would replace the stock configuration with an aftermarket catch can.
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Offline Cromoly

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Re: Café for a k1100
« Reply #51 on: February 25, 2019, 04:20:45 PM »

The "accumulator" in the stock airbox is essentially an oil catch can. So, ideally, you would replace the stock configuration with an aftermarket catch can.
[/quote]
I guess i could make a small catch tank similar to the cooling one, out of aluminum or anything really...
  • Quebec
  • K1100 cafe

Offline Laitch

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Re: Café for a k1100
« Reply #52 on: February 25, 2019, 05:13:11 PM »
I guess i could make a small catch tank similar to the cooling one, out of aluminum or anything really...
A juice box probably won't be as durable as aluminum. I think you're headed in the right direction though.
  • Along the Ridley in Vermont.
  • 1995 K75T 72,000 miles
I wept because I had no radials until I met a man who had no splines.
http://www.motobrick.com/index.php/topic,296.msg53303.html#msg53303

Offline boardjnky4

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Re: Café for a k1100
« Reply #53 on: March 01, 2019, 11:58:54 AM »
Anyone else has put pod filters on a k1100?
Someone must had to deal with this issue before, i cant find any more info?
I’ll give it a shot, pay close attention and see if i get sludges  in the throttle body.
From what i can see, it must be mostly fumes coming out of the crankcase beather hose.
Beeing mixted withe fuel/air mixture, i belive thath the system will compensate.
Anyway what do i know, îm just a basement moto mechanic triyng to undo what a bunch of verry well paid German engeineers worked hard to achieve! [ Invalid Attachment ]
Îll give it a shot, will keep posted next summer. I can always go back to the original aibox if all else fail.

I dug into this a little bit last night. You inspired me.

I actually ran my bike with the airbox and all breather hoses removed and observed air flow (BTW, it ran perfectly).

1. The rear breather hose had a steady stream of air venting from the crankcase.
2. All other hoses have no air movement at all. Both at idle, acceleration and holding RPMs. That indicates to me they are just returns for the positive pressure from the rear vent.
3. I noted that the hose running along the throttle body connects into the TBs BEFORE the butterfly valve. That indicates to me that it would never present a vacuum to the hoses that connect to it. It really is just an air re-circulation. As such, I really don't actually think it's necessary.

With that in mind, I have the following thoughts:

I would not put the rear crankcase breather directly to the TB hose like that picture. That is just asking for oil to enter the system. Either keep it with just a breather, or run a catch can. Putting just a breather does introduce the potential for some oil to leak out of the filter if it spits some out. I'd rather have it dripping/leaking than to have it enter the intake.

I'm planning on doing what you're doing. Just going to run a breather filter. If you look at pictures of the La Dini k1100, you can see that he also just has it venting to the side of the bike with a pod filter.

From the front crankcase hose, I did what you did and just jumped that over to the Y-fitting that is on the TB hose. I don't actually think any air flows FROM the front, so I don't think you'll ever get any oil spitting entering the TB (might want to monitor it, though). I also believe that you could probably plug it up, with zero consequence.
  • North America
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Offline Cromoly

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  • Posts: 52
Re: Café for a k1100
« Reply #54 on: March 02, 2019, 10:07:54 AM »
I dug into this a little bit last night. You inspired me.

I actually ran my bike with the airbox and all breather hoses removed and observed air flow (BTW, it ran perfectly).

1. The rear breather hose had a steady stream of air venting from the crankcase.
2. All other hoses have no air movement at all. Both at idle, acceleration and holding RPMs. That indicates to me they are just returns for the positive pressure from the rear vent.
3. I noted that the hose running along the throttle body connects into the TBs BEFORE the butterfly valve. That indicates to me that it would never present a vacuum to the hoses that connect to it. It really is just an air re-circulation. As such, I really don't actually think it's necessary.

With that in mind, I have the following thoughts:

I would not put the rear crankcase breather directly to the TB hose like that picture. That is just asking for oil to enter the system. Either keep it with just a breather, or run a catch can. Putting just a breather does introduce the potential for some oil to leak out of the filter if it spits some out. I'd rather have it dripping/leaking than to have it enter the intake.

I'm planning on doing what you're doing. Just going to run a breather filter. If you look at pictures of the La Dini k1100, you can see that he also just has it venting to the side of the bike with a pod filter.

From the front crankcase hose, I did what you did and just jumped that over to the Fitting that is on the TB hose. I don't actually think any air flows FROM the front, so I don't think you'll ever get any oil spitting entering the TB (might want to monitor it, though). I also believe that you could probably plug it up, with zero consequence.
Thanks for your interest, late response, real work got me busy...
You are right, the front breather should not do much, the rear breather is the on i am concerned about.
Others have build a hose assembly that joins the vent to the front of the TB via calibration holes using a one way valve (from other source).
From what i understand, the engine needs this negative pressure to work properly,
So by plugging under the butterfly, It solves this issue.
Monitoring will be done often... [ Invalid Attachment ]

  • Quebec
  • K1100 cafe

Offline Cromoly

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  • Posts: 52
Re: Café for a k1100
« Reply #55 on: March 02, 2019, 10:10:57 AM »
THATS exactly what i thought!!
Haha 😂
This might be why.

I AM LEFTHANDED , that is why my pics are upside down, i was pressing the camera button of my phone with my ... left hand.
Turned my phone around 180deg and voila...
  • Quebec
  • K1100 cafe

Offline boardjnky4

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  • Posts: 17
Re: Café for a k1100
« Reply #56 on: March 02, 2019, 03:32:56 PM »
Thanks for your interest, late response, real work got me busy...
You are right, the front breather should not do much, the rear breather is the on i am concerned about.
Others have build a hose assembly that joins the vent to the front of the TB via calibration holes using a one way valve (from other source).
From what i understand, the engine needs this negative pressure to work properly,
So by plugging under the butterfly, It solves this issue.
Monitoring will be done often... [ Invalid Attachment ]

To me, I don’t think it really needs a vacuum in order to properly vent the crankcase. And again, doing so, you risk sucking oil into your intake.
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  • K1100LT

Offline Laitch

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Re: Café for a k1100
« Reply #57 on: March 02, 2019, 06:30:17 PM »
To me, I don’t think it really needs a vacuum in order to properly vent the crankcase. And again, doing so, you risk sucking oil into your intake.
Post photos of your moto's setup, boardjnky4.
  • Along the Ridley in Vermont.
  • 1995 K75T 72,000 miles
I wept because I had no radials until I met a man who had no splines.
http://www.motobrick.com/index.php/topic,296.msg53303.html#msg53303

Offline Cromoly

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Re: Café for a k1100
« Reply #58 on: March 02, 2019, 07:58:02 PM »
To me, I don't think it really needs a vacuum in order to properly vent the crankcase. And again, doing so, you risk sucking oil into your intake.
You may be right, i have a small pod filter on order and a one way valve on order as well, i can do both and test. I guess i can put the filter on the breather for now and see. The setup would be the cleanest and most
« naked »
You did mentioned you ran your bike with the hoses unplugged, did you get any oil residue ?
It is the main reason i wanted to put a one way valve on the hose line.
  • Quebec
  • K1100 cafe

Offline Cromoly

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Re: Café for a k1100
« Reply #59 on: March 02, 2019, 08:22:02 PM »
More work and tidying up was done. [ Invalid Attachment ]
All of the rear of the bike is to my liking, everything was taken out of there, wires were tucked away and securely fastened.
 [ Invalid Attachment ]
Red gaz line on the way
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  • K1100 cafe

Offline Cromoly

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Re: Café for a k1100
« Reply #60 on: March 02, 2019, 08:28:56 PM »
 [ Invalid Attachment ]
This is the next project before it leaves the shop. The bike is scheduled to get a nice handmade custom exhaust system.
I need to figure out how to hook this  BEP 3.0 up to the Motogadjet clock...
  • Quebec
  • K1100 cafe

Offline billday

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Re: Café for a k1100
« Reply #61 on: March 03, 2019, 07:43:58 AM »
[ Invalid Attachment ]
Red gaz line on the way

Make sure that fuel line is up to the pressure of the K bike system.
  • New York State, USA 10977
  • 1985 K100

Offline boardjnky4

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Re: Café for a k1100
« Reply #62 on: March 03, 2019, 07:46:12 AM »
You may be right, i have a small pod filter on order and a one way valve on order as well, i can do both and test. I guess i can put the filter on the breather for now and see. The setup would be the cleanest and most
« naked »
You did mentioned you ran your bike with the hoses unplugged, did you get any oil residue ?
It is the main reason i wanted to put a one way valve on the hose line.

No actual residue, but I’m sure the air contains lots of oil vapors.
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Offline Laitch

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Re: Café for a k1100
« Reply #63 on: March 03, 2019, 10:49:46 AM »
No actual residue, but I’m sure the air contains lots of oil vapors.
My experience is that wherever there is oil vapor, there will be oil residue. Post some photos of your set up, boardjnky4.
  • Along the Ridley in Vermont.
  • 1995 K75T 72,000 miles
I wept because I had no radials until I met a man who had no splines.
http://www.motobrick.com/index.php/topic,296.msg53303.html#msg53303

Offline boardjnky4

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Re: Café for a k1100
« Reply #64 on: March 03, 2019, 10:52:18 AM »
My experience is that wherever there is oil vapor, there will be oil residue. Post some photos of your set up, boardjnky4.

Exactly! This was less than 5 minutes of runtime.

I’ll get some pics up soon when I’m not on mobile. My bike is coming along nicely.
  • North America
  • K1100LT

Offline Laitch

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Re: Café for a k1100
« Reply #65 on: March 03, 2019, 01:35:41 PM »
I’ll get some pics up soon when I’m not on mobile. My bike is coming along nicely.
Be sure to start your own thread in either the Custom or Restoration projects section—whichever applies to your work. Explain how long you've had the moto, how much riding you've done on it, etc..

Now, we'll return to Cromoly's thread.
  • Along the Ridley in Vermont.
  • 1995 K75T 72,000 miles
I wept because I had no radials until I met a man who had no splines.
http://www.motobrick.com/index.php/topic,296.msg53303.html#msg53303

Offline Cromoly

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Re: Café for a k1100
« Reply #66 on: March 03, 2019, 11:00:14 PM »
I think i found my next project...  [ Invalid Attachment ]
  • Quebec
  • K1100 cafe

Offline boardjnky4

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Re: Café for a k1100
« Reply #67 on: March 03, 2019, 11:02:58 PM »
More work and tidying up was done. [ Invalid Attachment ]
All of the rear of the bike is to my liking, everything was taken out of there, wires were tucked away and securely fastened.
 [ Invalid Attachment ]
Red gaz line on the way

Is that a cafe4euro collector? Did it fit pretty snug for you? Mine doesn’t seem to fit snugly and leaks pretty bad.
  • North America
  • K1100LT

Offline Cromoly

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Re: Café for a k1100
« Reply #68 on: March 03, 2019, 11:39:36 PM »

Is that a cafe4euro collector? Did it fit pretty snug for you? Mine doesn’t seem to fit snugly and leaks pretty bad.
[/quote]
I got the 4 into one in England, a speed shop called  BSK Spees Works,
http://www.bskspeedworks.co.uk/k-throttle-bodies.html
I got the rear set ansn rear master there too.
They do fit nicely, they are snug, there is probably lots of leak, i wouldn’t know !
The almost non existent exhaust is SOOO LOUD ....sorry i don’t know.
It is the main reason why we are changing the exhaust.
 [ Invalid Attachment ]  we found a master exhaust welder who can build anything!
Will keep posted.
  • Quebec
  • K1100 cafe

Offline boardjnky4

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  • Posts: 17
Re: Café for a k1100
« Reply #69 on: March 04, 2019, 08:51:16 AM »
Is that a cafe4euro collector? Did it fit pretty snug for you? Mine doesn’t seem to fit snugly and leaks pretty bad.

I got the 4 into one in England, a speed shop called  BSK Spees Works,
http://www.bskspeedworks.co.uk/k-throttle-bodies.html
I got the rear set ansn rear master there too.
They do fit nicely, they are snug, there is probably lots of leak, i wouldn’t know !
The almost non existent exhaust is SOOO LOUD ....sorry i don’t know.
It is the main reason why we are changing the exhaust.
 [ Invalid Attachment ]  we found a master exhaust welder who can build anything!
Will keep posted.

Good to know. I have a muffler that I like, which isn't too loud.

If you want to sell the collector, let me know.
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  • K1100LT

Offline Cromoly

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Re: Café for a k1100
« Reply #70 on: March 04, 2019, 09:06:15 PM »
 [ Invalid Attachment ]
The new finish on the gas tank is done and on the way.
Just brushed aluminium, raw ...
  • Quebec
  • K1100 cafe

Offline Cromoly

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Re: Café for a k1100
« Reply #71 on: March 04, 2019, 09:14:58 PM »
We are currently looking for a replacement gas cap, something slick and keyless.
  • Quebec
  • K1100 cafe

Offline Cromoly

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Re: Café for a k1100
« Reply #72 on: March 04, 2019, 09:16:54 PM »
 [ Invalid Attachment ]
Aluminum battery box is good to go!!
  • Quebec
  • K1100 cafe

Offline Barry in IN

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Re: Café for a k1100
« Reply #73 on: March 04, 2019, 09:20:36 PM »
We are currently looking for a replacement gas cap, something slick and keyless.
  • Indiana
  • 1992 K75S Lili Von Shtuppe
A pox on cafe “builders”

Offline Cromoly

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Re: Café for a k1100
« Reply #74 on: March 04, 2019, 09:25:15 PM »
Ho yesss that’s what i was thinking about! HAHA 🤣

  • Quebec
  • K1100 cafe

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