BMW K bikes (Bricks)


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1Back to top Go down    Smoking at startup on Wed Aug 12, 2015 11:01 am

piper1

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Hi guys, I'm General John. I'm new here and greetings from South Africa! I have a K100RS 1988 that was standing for a while.
So, when I fire her up, it's just smoke, like in,James Bond would like it. It seams to go away after she's warmed up.
Can one of you guru's tel me what to do? Shocked

    

2Back to top Go down    Re: Smoking at startup on Wed Aug 12, 2015 11:25 am

Two Wheels Better

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A 1988 model, she's old enough to smoke.

With the engine's top end pointing generally downhill when left on the sidestand, oil seeps past the rings into the combustion chamber. They're best parked on the centrestand.

The smoke should go away after a while, but while she's smoking it's good mossie control when camping.


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'77 R75/7-1000cc, '87 K100RS, '93 K12 Big Block, '94 R100 Mystic, '03 K1200GT, '04 R1150RT, '06 K1200R, '07 K1200R & '09 K1300GT
Two Airheads, three Bricks, an Oilhead and a trio of new K's.
    

3Back to top Go down    Re: Smoking at startup on Wed Aug 12, 2015 12:16 pm

duck

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Another option for avoiding the smoky startup from oil seeping past the rings:

Turn the bike off and then tilt it to the right for about 10-15 seconds before placing it on the side stand. This allows the oil behind the pistons to drain back into the sump so that there's less there to seep past the rings.


__________________________________________________
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
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

4Back to top Go down    Re: Smoking at startup on Wed Aug 12, 2015 2:06 pm

Avenger GT

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And also don't over fill it with oil. To the center of the sight glass when parked on the main stand is enough.

    

5Back to top Go down    Re: Smoking at startup on Wed Aug 12, 2015 3:03 pm

duck

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@Avenger GT wrote:And also don't over fill it with oil. To the center of the sight glass when parked on the main stand is enough.

That has NO impact on how much oil is behind the pistons when you shut down the bike and put it on the side stand. You can have the oil level at the bottom of the ring and if you put it on the side stand right away it will still make just as much smoke.


__________________________________________________
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
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

6Back to top Go down    Smoking at startup on Wed Aug 12, 2015 7:37 pm

RT

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Welcome from the best hemisphere.
I had a similar problem with my 85K, smoked liked crazy when I first got her to work after purchase.
I finally realised I actually couldn't see the oil level through the sight glass anymore. I emptied the oil out and found I had almost an extra litre in there. So I bought and fitted a new sight glass and most of the problem was solved.
Still smokes a bit after being on the sidestand, but I consider that a badge of respect for it's age, and never apologise for it anymore.

Good luck with it
RT


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Suzuki V Strom 650DL 2011. Gasp, chain driven.
    

7Back to top Go down    Re: Smoking at startup on Wed Aug 12, 2015 8:23 pm

Holister

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Yep. This is what I found also. Too much oil from the PO. After much consternation and worry I stumbled across an old guy who was a retired BMW m/c mechanic who said "it was probably overfilled. Just empty and refill with correct amount". Common problem with the sight glass as RT mentioned. I fill with 3 litres and then gradually till I can see it in the bottom of the sight glass. It will help not to fill past half way.
My old girl is not a smoker but I've adjusted the side-stand so it doesn't lean as much and I usually use the centre-stand anyway.


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1988 K100RT VIN No. 0094680
1989 K100RT VIN No. 0097367 (naked)
1996 K1100RS VIN No. 0451808
Fuel: 95 Octane
Engine Oil:Nulon Full Synthetic 15W50
Gear Box Oil: Nulon Synthetic 75W90
    

8Back to top Go down    Re: Smoking at startup on Wed Aug 12, 2015 8:24 pm

RicK G

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VIP
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I have found that if you have too much as in over the centre line on the sight glass then they will use more oil and that if left on the side stand they do accumulate oil in the combustion chamber and if an exhaust valve is open then it gets into the muffler and that causes a lot of smoke. As Duck has said lean it over to the right for a short time then back to the side stand, they still smoke but nowhere as much. I try to use the centre stand as much as possible.
Also engines tend to get a prefered place to rest at and more often than not stop in that place so that some engines smoke more as they tend to get more oil seepage.


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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
    

9Back to top Go down    Re: Smoking at startup on Wed Aug 12, 2015 11:05 pm

rawdonball

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Welcome from the left hand side of the continent on the right hand side in the right hemisphere.

How's life in the left hand side continent?

I have five runners and none of them smoke when left on the center stand. parked one on the side stand for a few weeks once and wet a plug so was cylindrically challenged till the plug was removed and cleaned. Side stand has had zero wear since then!


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'88 K100RT, '86 K75C, '05 Yamaha TTR250
    

10Back to top Go down    Smoking at startup on Thu Aug 13, 2015 7:25 am

piper1

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WOW! you guy's rock! Thanks for all the replies and telling me what to do Very HappyI realy thaught I have to replace the valve stem seals and oil rings 🤡
Kind regards to ya all ...Razz

    

11Back to top Go down    Re: Smoking at startup on Thu Aug 13, 2015 7:41 am

Dai

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@rawdonball wrote:Welcome from the left hand side of the continent on the right hand side in the right hemisphere.
Uh - does the left hand actually know what the right hand is doing??


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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)
    

12Back to top Go down    Re: Smoking at startup on Fri Aug 14, 2015 4:18 am

duck

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@Two Wheels Better wrote:A 1988 model, she's old enough to smoke.

Even newer ones are old enough to smoke. Due to garage logistics (fitting three bikes and a car into a small garage) I generally park my Ks on the side stand. Even my K1100s are very good at putting up a decent cloud if left on the side stand for a few weeks or so.

Early on it worried me somewhat but once I understood the cause and that it was just oil seeping past the rings it became more of a humorous novelty to me.


__________________________________________________
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
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

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