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  #1  
Old 11-25-2018, 11:43 AM
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Suspicious hole in the air filter housing

Hello everyone.
The other day I bought K1200RS and in the long autumn evenings I was engaged in preventive disassembly, cleaning, lubrication. And I discovered this. Has anyone paid attention to this suspicious rectangular hole?
In it the remains of foam rubber and open access of dirty air to the engine.

I do not know why this hole was invented, but I am sure that it should be closed.
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  #2  
Old 11-25-2018, 12:39 PM
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Re: Suspicious hole in the air filter housing

Here's a photo I pulled off ebay, looks like that hole is standard,



https://www.ebay.com/i/300968080635?chn=ps
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  #3  
Old 11-25-2018, 12:53 PM
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Re: Suspicious hole in the air filter housing

Quote:
Originally Posted by CJS350
Here's a photo I pulled off ebay, looks like that hole is standard.

Of course the standard. But is it standard to allow unpurified air in engine?
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  #4  
Old 11-25-2018, 01:40 PM
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Re: Suspicious hole in the air filter housing

Sorry, disregard the below... This is K1200rs not a K1200s.





I think a sensor or maybe the idle control valve plugs in there.


Edit- here, one of these...
From Max BMW motorcycle online parts fiche










01 13 71 8 523 475 IDLE SYSTEM (to 04/08)0.37 1 $190.25
ONLY APPLIES TO :
-- 13 71 7 705 567 INTAKE MUFFLER (to 04/08)4.28 X $397.06
ATTENTION! OBSERVE SI 50/2007 :
01 13 71 8 523 475 IDLE SYSTEM0.37 1 $190.25
02 13 71 7 702 060 IDLE CONTROL DEVICE0.24 1 NA
ONLY APPLIES TO :
-- 13 71 7 705 442 IDLE SYSTEM0.35 X NA
13717705442 was superseded by 13718523475.
03 11 61 7 535 849 SCREW - 5X20 4 $0.80


04 13 71 7 710 491 SET: SET, IDLE HOSE0.26 1 $108.76
06 11 73 7 681 005 VALVE - SLS0.22 1 $126.81
07 11 71 7 672 760 HOSE ASSY0.07 1 $80.96
08 54 10 7 055 524 FILLISTER HEAD SCREW - 4X15 2 $2.19



09 13 62 1 739 510 TEMPERATURE SENSOR AIR0.02 1 $102.69


10 13 62 1 743 299 O-RING - 8X3 1 $2.64


11 11 71 7 681 273 HOSE CLAMP 1 $5.02
12 13 71 7 676 459 VENT HOSE FOR CRANKCASE0.09 1 $25.29
13 11 11 7 698 258 RETURN HOSE0.07 1 $28.47
14 17 11 7 659 618 CLAMP - NW=14MM 2 $5.13
15 11 11 7 688 963 HOSE CLAMP - 22/8 2 $3.96


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  #5  
Old 11-25-2018, 02:44 PM
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Re: Suspicious hole in the air filter housing

Unfortunately, there are no sensors, no valve. Open hole only.
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File Type: jpg WP_20181125_22_35_20_Pro.jpg (316.2 KB, 9 views)
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  #6  
Old 11-25-2018, 03:21 PM
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Re: Suspicious hole in the air filter housing

Quote:
Originally Posted by Manrus
Hello everyone.
The other day I bought K1200RS and in the long autumn evenings I was engaged in preventive disassembly, cleaning, lubrication. And I discovered this. Has anyone paid attention to this suspicious rectangular hole?
In it the remains of foam rubber and open access of dirty air to the engine.
...
.....

On all K1200RS (1997-2005), because the air box is feed by a front entry having ram air pressure when riding, there is a risk of water ingestion into air box when riding in fairly heavy rain. To allow this "potential" water ingestion to drain out, BMW has included this hole in lowest point of the air box.

From the factory, the hole is filled with a small foam piece to filter dirt or insect from coming in. Over time (more than 10 years) the foam will sometimes crumble , depending on storage conditions (temp, humidity).

I would just fill it with semi dense foam - just dense enough to fit a bit tight into hole.
But not so dense so that water will have no problem dripping down.
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~~~~~~~~~~~~~~~~~~~~~~~~~~
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K1200RS (2002 IceBlue/Red - 95,000 miles)
~~~~~~~~~~~~~~~~~~~~~~~~~~
K1200RS parts for sale here:
http://www.i-bmw.com/classifieds/sho...500&ppuser=144
++++++++++++++++++++++++++
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  #7  
Old 11-25-2018, 04:00 PM
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Re: Suspicious hole in the air filter housing

Quote:
Originally Posted by sailor
On all K1200RS (1997-2005), because the air box is feed by a front entry having ram air pressure when riding, there is a risk of water ingestion into air box when riding in fairly heavy rain. To allow this "potential" water ingestion to drain out, BMW has included this hole in lowest point of the air box.

From the factory, the hole is filled with a small foam piece to filter dirt or insect from coming in. Over time (more than 10 years) the foam will sometimes crumble , depending on storage conditions (temp, humidity).

I would just fill it with semi dense foam - just dense enough to fit a bit tight into hole.
But not so dense so that water will have no problem dripping down.
Sailor - you are the best.
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  #8  
Old 11-25-2018, 05:05 PM
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Re: Suspicious hole in the air filter housing

One more piece of this air box puzzle for those that are anal like me and want to understand everything....

When installed properly, the 4 intake rubber stubs entering the air box (just above throttle-bodies) are designed to be higher than the "floor" of the air box where this small hole is located (lower part). Normally these 4 rubber stubs stay attached to the air box - even when the air box is removed. I have no idea why our friend from Russia has removed these rubber intake stubs unless he intends to modify the air box... OR MAYBE he is modifying a limited 100HP version of the K1200RS that have smaller rubber stubs (mainly sold in France because of an old law limiting to 100HP all motorcycles until very recently).

Hence, unless there is a very large / abnormal amount of water into the air box, this water is forced into a puddle toward this small hole where the foam is located. Nothe that the 2 front cylinders rubber stubs are higher compare to the air box front lowest part (at yellow arrow line), so the water will not tend to go direct down into the throttle bodies as easily.

In addition, the front ram air snorkel (from front of fairing to air box) is also designed to reduce probability of water getting this far as a paper air filter will restrict air flow when soaked. Design is such that most water will drop down toward bottom of snorkel located along the right side fairing (where drain holes are located).
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File Type: jpg K1200RS_Intake-Manifold-to-Air-Filter (130 hp).jpg (68.2 KB, 34 views)
__________________
~~~~~~~~~~~~~~~~~~~~~~~~~~
Jean (Montreal, CANADA)
K1200RS (2002 IceBlue/Red - 95,000 miles)
~~~~~~~~~~~~~~~~~~~~~~~~~~
K1200RS parts for sale here:
http://www.i-bmw.com/classifieds/sho...500&ppuser=144
++++++++++++++++++++++++++
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  #9  
Old 11-25-2018, 09:40 PM
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Re: Suspicious hole in the air filter housing

Them manifolds have an internal plastic sleeve.Split lenghtwise for removal/installation.

So if manifolds popped out one should remove the sleeve,push manifold back into the airbox and then push the sleeve back in.
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Old 12-02-2018, 11:05 AM
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Re: Suspicious hole in the air filter housing

Suspicious me.....!I did suspect that my foam was gone.Been 3-4 years since I had the airbox apart.Sure time for a clean up and rubber restoration/greasing.Couple of them manifolds are a little loose in the airbox.

No way one can install a foamy without removing the adjacent manifold.First step was to get a little piece of "air filter foam".The real thing....resists oil and gasoline unlike some of the grey foam stuff that will disintegrate over time.

I didn't want to cut out of a perfectly good lawnmower air filter I have but my buddy had quite a few small pieces of filter foam on his bench.


2018-12-02_07-49-16 by Pierre Begin - Flickr2BBcode
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Yamaha RD200 at 16
Yamaha RD350 at 17
Honda CB750F at 18
Honda V45 Sabre at 24
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90 BMW R100GS at 34 (Too slow, too cranky)
2003 K1200 RS at 53 (Oh Yeah......over 6000RPM)
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  #11  
Old 12-02-2018, 02:06 PM
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Re: Suspicious hole in the air filter housing

Quote:
Originally Posted by Jako
Sailor - you are the best.




He is!
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There's never enough time to do it right... But there's always enough time to do it over!
This is only a good thing when applied to riding... or sex!
Ride West 2008
http://www.i-bmw.com/showthread.php?p=191559#post191559
Ride West 2009 http://www.i-bmw.com/showthread.php?t=24292
Dad & daughter Ride 2011 http://www.i-bmw.com/showthread.php?t=35470
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Old 12-02-2018, 02:09 PM
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Re: Suspicious hole in the air filter housing

Quote:
Originally Posted by pbegin@burton
Suspicious me.....!I did suspect that my foam was gone.Been 3-4 years since I had the airbox apart.Sure time for a clean up and rubber restoration/greasing.Couple of them manifolds are a little loose in the airbox.

No way one can install a foamy without removing the adjacent manifold.First step was to get a little piece of "air filter foam".The real thing....resists oil and gasoline unlike some of the grey foam stuff that will disintegrate over time.

I didn't want to cut out of a perfectly good lawnmower air filter I have but my buddy had quite a few small pieces of filter foam on his bench.


2018-12-02_07-49-16 by Pierre Begin - Flickr2BBcode




You would have something for that!
__________________
Louis



There's never enough time to do it right... But there's always enough time to do it over!
This is only a good thing when applied to riding... or sex!
Ride West 2008
http://www.i-bmw.com/showthread.php?p=191559#post191559
Ride West 2009 http://www.i-bmw.com/showthread.php?t=24292
Dad & daughter Ride 2011 http://www.i-bmw.com/showthread.php?t=35470
André Slabbinck 1957-2014 http://www.i-bmw.com/showthread.php?t=50135
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  #13  
Old 12-02-2018, 03:00 PM
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Re: Suspicious hole in the air filter housing

Quote:
Originally Posted by Jako
Sailor - you are the best.

Quote:
Originally Posted by Louis
He is!

Glad to have a few fans who recognize my effort to help with K1200RS - I am just trying to pay it forward...

BUT HONESTLY... I think that Pierre (PBEGIN) deserves the KING title for the K1200RS - both for knowledge AND creative solutions to maintenance problems.
__________________
~~~~~~~~~~~~~~~~~~~~~~~~~~
Jean (Montreal, CANADA)
K1200RS (2002 IceBlue/Red - 95,000 miles)
~~~~~~~~~~~~~~~~~~~~~~~~~~
K1200RS parts for sale here:
http://www.i-bmw.com/classifieds/sho...500&ppuser=144
++++++++++++++++++++++++++
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  #14  
Old 12-02-2018, 03:07 PM
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Re: Suspicious hole in the air filter housing

Quote:
Originally Posted by sailor
Glad to have a few fans who recognize my effort to help with K1200RS - I am just trying to pay it forward...

BUT HONESTLY... I think that Pierre (PBEGIN) deserves the KING title for the K1200RS - both for knowledge AND creative solutions to maintenance problems.




Humble too!




__________________
Louis



There's never enough time to do it right... But there's always enough time to do it over!
This is only a good thing when applied to riding... or sex!
Ride West 2008
http://www.i-bmw.com/showthread.php?p=191559#post191559
Ride West 2009 http://www.i-bmw.com/showthread.php?t=24292
Dad & daughter Ride 2011 http://www.i-bmw.com/showthread.php?t=35470
André Slabbinck 1957-2014 http://www.i-bmw.com/showthread.php?t=50135
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  #15  
Old 12-02-2018, 05:54 PM
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Re: Suspicious hole in the air filter housing

Quote:
Originally Posted by Louis
Humble too!





And cheap too!

They let you loose? I should Frankenstein that GS thing before I head your way and pick up some very gently used (and cheap) parts for the K in Wa.
__________________
Benelli 50cc at 14
Yamaha RD200 at 16
Yamaha RD350 at 17
Honda CB750F at 18
Honda V45 Sabre at 24
85 BMW K100RS at 28 (Very nice and sorely missed)
90 BMW R100GS at 34 (Too slow, too cranky)
2003 K1200 RS at 53 (Oh Yeah......over 6000RPM)
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  #16  
Old 12-03-2018, 09:24 AM
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Re: Suspicious hole in the air filter housing

Quote:
Originally Posted by pbegin@burton
And cheap too!

They let you loose? I should Frankenstein that GS thing before I head your way and pick up some very gently used (and cheap) parts for the K in Wa.






Don't forget the currency exchange rates...
__________________
Louis



There's never enough time to do it right... But there's always enough time to do it over!
This is only a good thing when applied to riding... or sex!
Ride West 2008
http://www.i-bmw.com/showthread.php?p=191559#post191559
Ride West 2009 http://www.i-bmw.com/showthread.php?t=24292
Dad & daughter Ride 2011 http://www.i-bmw.com/showthread.php?t=35470
André Slabbinck 1957-2014 http://www.i-bmw.com/showthread.php?t=50135
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  #17  
Old 12-03-2018, 09:58 AM
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Re: Suspicious hole in the air filter housing

Quote:
Originally Posted by Louis
Don't forget the currency exchange rates...

And taxes? Someone has to pay some taxes.....keeps my cheques coming every month!

Lets see? $500.00 in new BMW parts? I think I'll keep "that" repair at $100.00 w/tax.Labor is free....!
__________________
Benelli 50cc at 14
Yamaha RD200 at 16
Yamaha RD350 at 17
Honda CB750F at 18
Honda V45 Sabre at 24
85 BMW K100RS at 28 (Very nice and sorely missed)
90 BMW R100GS at 34 (Too slow, too cranky)
2003 K1200 RS at 53 (Oh Yeah......over 6000RPM)
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  #18  
Old 12-03-2018, 10:54 AM
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Re: Suspicious hole in the air filter housing

Quote:
Originally Posted by pbegin@burton
And taxes? Someone has to pay some taxes.....keeps my cheques coming every month!

Lets see? $500.00 in new BMW parts? I think I'll keep "that" repair at $100.00 w/tax.Labor is free....!




Might be free... mais c'est pas du "cheap labor" !
__________________
Louis



There's never enough time to do it right... But there's always enough time to do it over!
This is only a good thing when applied to riding... or sex!
Ride West 2008
http://www.i-bmw.com/showthread.php?p=191559#post191559
Ride West 2009 http://www.i-bmw.com/showthread.php?t=24292
Dad & daughter Ride 2011 http://www.i-bmw.com/showthread.php?t=35470
André Slabbinck 1957-2014 http://www.i-bmw.com/showthread.php?t=50135
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