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1Back to top Go down   Crankcase breather hose Empty Crankcase breather hose Sun 1 Apr 2012 - 4:16

RT

RT
Life time member
Life time member
Hi everyone
amongst all the other small problems I've had and fixed, I noticed that I am without a crankcase breather hose at all. I have read a few posts about this tube, but mine just has a small traingularish shaped hole on the top of the crankcas, and checking against my 86 model spares bike, it had the same, with just a small tube stuck in it a fair way, and looped down and out under the crankcase. (to breath I assume).
Anyway, I was thinking of just sticking this tube in on my 85 Blue Max, but other posts seem to suggest it should have a more formal setup.
Anyone seen anything similar?
Thanks
RT

    

2Back to top Go down   Crankcase breather hose Empty Re: Crankcase breather hose Sun 1 Apr 2012 - 5:02

charlie99

charlie99
VIP
VIP
triangularish hole ? wow rt ....

but yes the breather is important ....check at the plenum that there isnt a largish hole to the atmosphere, i thought the breather was about 10mm inside diameter so you should find a fairly largish metal tube to mount the breather tube to ....same behind the coils ...more or less slightly forward , a verticle port of about 10 mm



this might explain quite a few things about your idle and all the rest of the stuff that might have been affecting performance

crikey ...i think you need either 1 > to make our workshop day on april 14th up at kingaroy or

2> someone ...or many of us ...to arrive at your place for a few days

wouldnt cost a lot ....well let me rephrase that ...wouldnt cost as much as the bmw dealer ...after all we would expect copious amounts of grog .......grin


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
1987 k100rs ########   "Red"  - (red sports rs TWB style )
1989 K100rt #009637   "Black Betty"  (naked rt ala Nigel , now sporting an rs main fairing )
    

3Back to top Go down   Crankcase breather hose Empty Re: Crankcase breather hose Sun 1 Apr 2012 - 5:29

Two Wheels Better

Two Wheels Better
Moderator
Moderator
Have a look at this link to see whether your bike is 'missing' the all-important crankcase vent hose 'tween airbox and cylinder block. It's item number ten. She sure wouldn't idle or run very well at all without it. It is, as Chazza suggested, at the back of the block behind the ignition coils, shaped like a lazy 'S', and is clamped on at both ends - the airbox and the aluminium flange on the block. Perhaps you're just not seeing it...Or you're taking the piss.

http://realoem.com/bmw/showparts.do?model=0503&mospid=51751&btnr=11_4676&hg=11&fg=11


__________________________________________________
How we spend our days is, of course, how we spend our lives. - Annie Dillard, author - born 1945
1977 R75/7-100, '93 K11/K12 Big Block, '93 K1100RS, '95 R100 Mystic, '96 K1100RS, 2 x '98 K1200RS, '06 K1200R & '09 K1300GT. Projects: 1993 & '96 K1100RS, & one '98 K1200RS. The R100 Mystic, K11/12 Big Block, 2nd K1200RS, K1200R & K1300GT are running, rego'd & ridable.
    

4Back to top Go down   Crankcase breather hose Empty Crankcase breather hose Sun 1 Apr 2012 - 17:56

RT

RT
Life time member
Life time member
Well obviously I have given you guys a misleading description. I will try and get a piccy later today. It is not the S shaped hose, I replaced that several thousand dollars ago.
When I was away with the boys last year I noticed everyone had two small breather hoses hanging down underneath their bikes. One is the battery breather, and I now guess the other is a "transmission"breather (not crankcase as stated. I have already gone to the back of the class for that).
I actually have neither. The battery I can fix ( except I don't seem to have a nozzle outlet on my battery).
The other is only about 4 mil inside diameter black hose coming form underneath where the battery holding plate sits. When I get my camera out later I can show you. Thanks for your bewilderment.
And no, Guest, was not taking the pess, just being naive yet again.
Cheers
RT



Last edited by RT on Sun 1 Apr 2012 - 17:56; edited 1 time in total (Reason for editing : typo)

    

5Back to top Go down   Crankcase breather hose Empty Re: Crankcase breather hose Sun 1 Apr 2012 - 19:21

Rick G

Rick G
admin
admin
Sounds to me that you have the left overs of a battery breather hose. The small hole under the battery carrier just goes through the case and into the viod behind the swingingarm and was for a battery breather tube. The vent for the gearbox is at the front of the gearbox and almost under the starter (it cant be seen till you remove the starter). If you don't have a little stub to attach a breather to the battery then it is most likely a sealed maintenance free one.
The only breather your crankcase will have is the one with the z shaped tube from the plenum chamber.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1999 K1100 LT with a Big Block 1200
    

6Back to top Go down   Crankcase breather hose Empty Crankcase breather hose Sun 1 Apr 2012 - 23:08

RT

RT
Life time member
Life time member
Crankcase breather hose Img_1116
So this is normal then, although the tube was vented downwards to the ground.
Crankcase breather hose Img_1117
That is the battery carrier there with tube underneath. Of course my real bike is nowhere near as dirty.

    

7Back to top Go down   Crankcase breather hose Empty Re: Crankcase breather hose Mon 2 Apr 2012 - 0:14

charlie99

charlie99
VIP
VIP
there should be one other tube going down there ...or near there also ...that is the cup under tank drain hose ..

just a heads up


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
1987 k100rs ########   "Red"  - (red sports rs TWB style )
1989 K100rt #009637   "Black Betty"  (naked rt ala Nigel , now sporting an rs main fairing )
    

8Back to top Go down   Crankcase breather hose Empty Re: Crankcase breather hose Mon 2 Apr 2012 - 4:48

greecek100rt

greecek100rt
active member
active member
23,11 $ !!!!!!!! the vent hose

any suggestions for somenthing cheaper ????



Crankcase breather hose 710

    

9Back to top Go down   Crankcase breather hose Empty Re: Crankcase breather hose Mon 2 Apr 2012 - 5:10

Inge K.

Inge K.
VIP
VIP
greecek100rt wrote:any suggestions for somenthing cheaper ????
Buy three of them before the price rises again........they have a short average lifespann.

Placing a order in US?........£10,50 (+VAT, which you don`t pay) from Motobins.


__________________________________________________
Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

10Back to top Go down   Crankcase breather hose Empty Re: Crankcase breather hose Mon 2 Apr 2012 - 5:25

Inge K.

Inge K.
VIP
VIP
RT: The hose you have in the piccie is an old battery breather hose.

Charlie: The drain hose from the "cup" is routed down behind the right footrest bridge.


__________________________________________________
Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

11Back to top Go down   Crankcase breather hose Empty Re: Crankcase breather hose Mon 2 Apr 2012 - 5:59

sidecar paul

sidecar paul
Life time member
Life time member
Just for info, the early K's, before the 'cup', had two hoses from the tank, vent and overflow, both running behind the right footrest.
Paul.


__________________________________________________
'84 K100RS (0014643) (owned since '85), 86 K100RS (0018891) with Martello sidecar (built as an outfit in '88),
'51 Vincent (since '67),'72 Montesa Cota (from new), '87 Honda RS125R NF4 (bought 2015) 
....No CARS never ever!
    

12Back to top Go down   Crankcase breather hose Empty Crankcase breather hose Mon 2 Apr 2012 - 8:18

RT

RT
Life time member
Life time member
Thanks,
I can put this one to bed now, something less to worry about.
Now to replace the coolant sight tube, man this is never ending.
RT :arrow:

    

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