BMW K bikes (Bricks)

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1Back to top Go down    Oil on the clutch lever under the bike on Wed Jun 13, 2018 12:25 am

timz10000

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Rode 400 miles this weekend in the Texas hill country on my '85 K100 after finally cleaning out my gas tank enough to get great fuel delivery, then snapped my clutch cable on the way home from work Monday. (This bike never strands me far from home, always breaks in a way that teaches me another lesson - in short, the perfect obsession...)

I ordered a replacement clutch cable and looked up how to replace it, but I see there's a lot of gunk on the clutch arm on the underside (see photos).

Is this something I can just clean up, or does it mean there's a bad seal or something that needs to be rebuilt at the back of the engine? I'm not noticeably losing engine oil or gearbox oil but I'm not too familiar with what's down there. Also: I have a complete '85 parts bike, so I can swap parts if recommended.

Any advice?



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1985 K100
    

indian036

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Looks mostly road grunge to me, though the darker colour on the clutch arm raises questions.

I'd give the area a good clean, then see if it seems to be showing oil leak evidence after that.

Bill


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1985 K100RT VIN 0028991 My original Very Happy (Historic rego)
1985 K100RT VIN 0029036 BOB the Blue Old Bike (Historic rego)
1990 K100LT VIN 0190452 Work in progress
1984 K100RT VIN 0023022 Work needing lots of progress

1986 K100RT VIN 0090542 Work needing lots and lots of progress
1993 K1100LT VIN 0183046 Work in progress
1993 K75S VIN 0213045 Newest toy, slightly non-original
    

Born Again Eccentric

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@indian036 wrote:Looks mostly road grunge to me, though the darker colour on the clutch arm raises questions.

I'd give the area a good clean, then see if it seems to be showing oil leak evidence after that.

Bill
I'd say that your pics show definite evidence of an oil leak - you will probably find that the rubber boot is split, so the oil will probably be from the gear box. It doesn't take much oil to cover everything and that then acts as a dirt magnet to attract and accumulate road grunge and end up with that classic looking black oily paste covering everything.

As Indian says - first thing is to clean it off and then you will be able to either see the leak or, if it is very small, at least detect where it may be coming from.

Personally, I would have a rubber boot on order anyway though as my money is on it being split


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Paul

"Heidi" K100LT 1991 (Grey) (VIN 0190172 Engine No. 104EB 2590 2213) - 5th owner. January 2014 (34,000 - 61,000 miles and counting....)
"Gretel" K100LT 1989 (Silver Grey) (VIN 0177324 Engine No. 104EA 2789 2211) - 4th+ owner. September 2015 (58,500miles and counting....). Cat C Insurancewrite-off rebuild Feb 17
"Donor" K100LT 1990 (Red) (VIN 0178091 Engine No. 4489 2024) - 6th & final owner (crash write-off now donor bike). June 2012 (73,000 miles) to November 2013 (89,500 miles)
    

Point-Seven-five

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My money is on that boot as well.


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Present:
1994 K75RT
1994 K75S
1992 K100RS

Past:
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

5Back to top Go down    Re: Oil on the clutch lever under the bike on Wed Jun 13, 2018 10:38 am

duck

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Probably a torn boot but sometimes the bolt in the clutch arm is not seated properly in the hole of the boot.


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Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

TacKler

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The boot. You probably won't see the split till the boot expands. Not an expensive part.


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Red 1991 K75S
    

timz10000

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@TacKler wrote:The boot. You probably won't see the split till the boot expands. Not an expensive part.

Thanks - I cleaned it all up and the boot is clearly split.

    

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