BMW K bikes (Bricks)

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1Back to top Go down   Final drive breather Empty Final drive breather on Mon Aug 17, 2015 7:39 am

Dai

Dai
Life time member
Life time member
The wee black cap on the final drive breather... is it removable? I ask before I try and butcher it. My reason for asking is that after some rather spirited riding round central Wales last week it threw EP90 all over itself (no, it wasn't over filled Very Happy ). I did a full oil service this weekend and found the final drive full of milk (!); based on the number of puddles around here water ingress was probably the cause of the EP90 egress. What I propose to do is what I used to do with my V50s: remove the cap and add a length of breather pipe sufficient to retain any EP90 fling and tucked away to prevent any water ingress.


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'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

2Back to top Go down   Final drive breather Empty Re: Final drive breather on Mon Aug 17, 2015 7:47 am

92KK 84WW Olaf

92KK 84WW Olaf
Life time member
Life time member
Wasn't a few wet pants moments?


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1992 K100LT 0193214 Bertha Alaska Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 58,645 now 98,780 miles
1983 K100RS 0011171 Fricka 29,495 miles Damn K Pox Its a Bat outta Hell No 32,600 miles
    

3Back to top Go down   Final drive breather Empty Re: Final drive breather on Mon Aug 17, 2015 9:26 am

Dai

Dai
Life time member
Life time member
I've got completely waterproof waterproofs, I'll have you know! Actually, if I hit a big puddle hard enough (40mph+) the resulting spray hits the bottom of the fairing, migrates up the inside of my waterproofs, runs down my boot and blinds me all at the same time. I love this country.


__________________________________________________
'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

4Back to top Go down   Final drive breather Empty Re: Final drive breather on Mon Aug 17, 2015 1:00 pm

brickrider

brickrider
Life time member
Life time member
Dai, in the not so distant past I was surprised during a final drive fluid change to discover water contamination.  It was quite a puzzle, since I live and ride in an arid environment. The water must have come from a bike washing, yet I never use high pressure and take care to avoid hosing down the final drive area.  In response to my post, someone (Inge, I believe) offered some suggested mods to the vent, which I did.  I've yet to change the final drive lube since I made the mod to the vent.  I'm hoping that when I do I'll find nothing but lube drains out.  If that proves not to be the case, I'll sure be interested in your experience with an extended vent tube.
I'm terrible at searching, but you may find the relevant posts here somewhere.


__________________________________________________
Brickrider
1985 K100RS; brick red, of course!
    

5Back to top Go down   Final drive breather Empty Re: Final drive breather on Mon Aug 17, 2015 2:45 pm

Dai

Dai
Life time member
Life time member
Condensation, is my guess. Although you live in an arid environment the bevel drive will have it's own microclimate inside. Given that ID is a ways inland, I hazard a guess that there's quite a temperature swing over twenty-four hours. Could also be part of my problem, of course.

[Edit] This post? http://www.k100-forum.com/t8979-k100rs-final-drive-mystery


__________________________________________________
'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

6Back to top Go down   Final drive breather Empty Re: Final drive breather on Mon Aug 17, 2015 4:59 pm

brickrider

brickrider
Life time member
Life time member
Yes, that's the one. Final drive breather 112350


__________________________________________________
Brickrider
1985 K100RS; brick red, of course!
    

7Back to top Go down   Final drive breather Empty Re: Final drive breather on Mon Aug 17, 2015 6:50 pm

sidecar paul

sidecar paul
Life time member
Life time member
Dai, in answer to your question, the black breather cap is 'just' a push fit and it should come off with a bit of leverage.

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!
    

8Back to top Go down   Final drive breather Empty Re: Final drive breather on Tue Aug 18, 2015 7:35 am

Dai

Dai
Life time member
Life time member
Thanks Paul. I love how every single topic gets sidetracked... Very Happy


__________________________________________________
'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

9Back to top Go down   Final drive breather Empty Re: Final drive breather on Wed Aug 19, 2015 10:33 am

K100LT Notts

K100LT Notts
Silver member
Silver member
When I changed my splines I left the final drive unit on its side for a few days and oil got into the space just below the vent.  Later air expansion blew this out of the breather as the compartment does not drain down into the main part.  I thought I had a fault but there was none.
Once that little compartment (below breather) is empty oil not longer comes out. ☺

    

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