BMW K bikes (Bricks)

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1Back to top Go down    New member on Mon Feb 01, 2016 8:33 pm

K-TAS

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Goodday All. I have decided it is time to get off my butt and get my old brick mobile. I bought the bike three years ago as a project but it ended up in the back of the shed covered in a blanket.When purchased it was grossly over filled with oil and blew huge clouds of oil smoke when running. I had it running for a couple of minutes with no exhaust and no4 was giving a bit of smoke . Is it possible that when stored for extended periods on the side stand with excess oil in the engine that oil could get into the muffler? I had a similar experience but to a lesser degree with a r100gs. Parked for 4 days on the side stand and it blew a heap of smoke on start up but cleared after a few minutes. I am thinking of installing a new set of rings but need guidance.

Cheers..........Wayne....aka...K-TAS

    

2Back to top Go down    Re: New member on Mon Feb 01, 2016 8:50 pm

RicK G

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Hi Wayne welcome to our Knuthaus. The Ks are famous for the oil in the mufler trick even if only a little over full. Take it for a ride to burn the oil out then get used to parking it on the centre stand or denying that the trail of smoke was from your BMW.


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If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

3Back to top Go down    Re: New member on Mon Feb 01, 2016 9:40 pm

Point-Seven-five

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I would guess that your rings are in good shape.

I just went through an exercise in replacing the valve stem oil seals. My K100 had 110,000 miles on it and was smoking and using about a quart of oil in 500 miles. When I opened things up, the cylinder walls still showed fresh crosshatch. A compression test showed very good.

Get the oil level corrected and see how much it smokes after the first couple minutes of running. You may find that everything is ok.


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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
    

4Back to top Go down    Re: New member on Mon Feb 01, 2016 9:44 pm

88

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Welcome K-Tas. The smoking on the sidestand thing is normal. Good Onya for getting it going. Don't be too quick to diagnose major failure with a K, it's usually something minor. Whatever it is 99.9% of the answers are here.


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88....May contain nuts!

"The world is a book and those who do not travel read only one page." - St. Augustine from 1600 years ago & still true!

Bike: K100LT 1988. 0172363. AKA the Bullion Brick! Mods: k1100 screen and stands.
K1: 1990. 6374189. Custom Stealth Black paint.
    

5Back to top Go down    Re: New member on Tue Feb 02, 2016 12:43 am

Brad-Man

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Glad to have you active. Welcome.


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Toys don't make the man - Man makes the toys....
    

6Back to top Go down    Re: New member on Tue Feb 02, 2016 5:17 am

92KK 84WW Olaf

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The earlier pistons don't have the rings pinned. All piston rings must have an end gap when cold so that when they heat up these end gaps close. Because not pinned and even when they are oil can/WILL end up behind the piston and seep past the rings into the combustion chamber. This happens because the bores slope to the left and the oil left behind the piston drains downhill toward the cylinderhead. Any piston near top dead centre can have a serious amount of oil on the underside. This will drain through the end gap and hey presto.....smoke. Overfill will make it much worse, so too does dropping on the side stand and then killing the engine. Kill the engine first, turn off ignition, open helmet, drop sidestand and only then drop the bike over....much less smoke. I can make serious smoke of I try, but if I do that then no smoke at all.

Main thing is never judge a K by the smoke when you fire it up from cold, its only because of the engine configuration.


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1992 K100LT 0193214 101,000 miles
1984 K100RT 0022575 Baja Red bought 36,000 now 87,100 miles
1997 K1100LT 58,000 miles
    

7Back to top Go down    Re: New member on Wed Feb 03, 2016 12:13 pm

Dave

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Hi Wayne, welcome to the group. Good luck to getting your K back on the road.


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Dave Very Happy

1987 K100rs
2009 R1200R
    

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