BMW K bikes (Bricks)

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1Back to top Go down   Leaning it over Empty Leaning it over Tue May 14, 2013 3:09 pm

JimK

JimK
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Folks,

Been travelling 70 miles per day round trip to work and back lately.

Have a right front fork seal that has been weeping, leaking slightly.
Have not fixed it yet.

Noticed that lately when going into one of my long continous radius favorite sweepers...the bike starts to wallow back and forth, when leaning over pretty hard..enough, to be disconcerting.

Am carrying a lot more tools than when was just ridng solo.

The folks at work are amazed about how many tools, (carpenter), that I have routinely stuffed in the panniers. Very Happy

Went out just now to figure out how and dial up the Ohlins rear as well.



Last edited by JimK on Tue May 14, 2013 3:24 pm; edited 1 time in total


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'89 k100 rs se
    

2Back to top Go down   Leaning it over Empty Re: Leaning it over Tue May 14, 2013 3:19 pm

JimK

JimK
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...and am continuing...

Looked hard at all of the steering bits, looked hard at the rear shock mount. Looked hard and did try to rock the rear tire and assembly.and had no play in that.
Skins/tyres/tires are getting worn. They are about at the end of the line, but have enough tread to be OK in the wet, for a short time.

Question is, could some loss of damping fluid from that one fork, cause the machine to be unhappy when asked to lean over pretty hard?

Thanks for thoughts.


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'89 k100 rs se
    

3Back to top Go down   Leaning it over Empty Re: Leaning it over Tue May 14, 2013 3:50 pm

88

88
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Some quick questions that will give more information:
Is the leaking fork on the inside or outside of the curve when this is happening?

Are the panniers evenly loaded for weight?

Are the tire/tyre pressures correct for the weight of the tools.

I have had issues with handling when loaded just based on pressures alone, an imbalance in the loading/luggage would exaggerate it to the point I was checking head bearings etc.

Finally a leaking fork seal won't heal itself....bite the bullet and get it done!

88


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Leaning it over Ir-log11 88....May contain nuts!Leaning it over Ir-log11

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

K1100LT 1992 - AKA Big Red
K1100RS - 1995. AKA Rudolf Von Schmurf (in a million bits)
K1/RS - AKA Titan (unique hybrid by Andreas Esterhammer)
    

4Back to top Go down   Leaning it over Empty try this Tue May 14, 2013 4:15 pm

ibjman

ibjman
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Find the threads on here related to adjusting the steering head bearings. be sure you get them tight enough to get some "pre-load" on the bearings citing the "fall away method" in the threads. This may not correct the issue, but it's free & worth a try. This when set correctly will create a "dampening" effect on the steering. Also, try running the tires up to near max air pressure, at least as an experiment
Regards, ibj...

    

5Back to top Go down   Leaning it over Empty Re: Leaning it over Tue May 14, 2013 6:51 pm

AL-58

AL-58
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My first K had a wallow on high speed sweepers. It seemed to come from the rear and never developed into anything dangerous. Turned out to be a rear shock lacking in damping. Changing to a Koni fixed it. As you already have the Ohlins try adjusting the rebound damping to a firmer setting to see if it makes a difference.
Another recent experience from a guy I know in Vic. His bike had been a bit weavy for a while and they couldn't find the problem. A couple of weeks it suddenly got worse, the bike wasn't really rideable and they rode home verrry slowly. Both front engine mount bolts were missing! From the dirt on the mounting hole one bolt had been missing a while. I've never heard of this happening on a K before. Its a K100RS 8V

Al


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'87 K100RS/HRD sidecar (1100 motor)  sc25 
'92 K100RS-16v (Paint it Black)

'87 K100RT with Paralever backend

"When I'm too old and too foolish to handle a sidecar I'll buy a Sportsbike"

Leaning it over K-dogs10
    

6Back to top Go down   Leaning it over Empty Leaning it over Tue May 14, 2013 7:39 pm

RT

RT
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My handling was similar but changed completely with new fork oil and new Sports Demon tyres and firmer setting on the rear shock.


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2011 R1200RT
    

7Back to top Go down   Leaning it over Empty Re: Leaning it over Tue May 14, 2013 9:11 pm

RicK G

RicK G
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Loss of rebound damping on the front will cause the rear to wallow every bit as much as a bad rear shockie.
The front will rebound quickly changing the geometry quickly making the back wallow. A steering damper can help but there is only one solution and that is fix the front end.


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"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 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

8Back to top Go down   Leaning it over Empty Re: Leaning it over Wed May 15, 2013 2:49 am

MikeP

MikeP
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How many miles on the Ohlins?

They are service items. My experience with Ohlins is that although they are good they do need servicing.

That said, I'd deal with the obvious thing first; change the fork oil and replace the leaking seal.

    

9Back to top Go down   Leaning it over Empty Re: Leaning it over Wed May 15, 2013 3:10 am

92KK 84WW Olaf

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For what its worth I sometimes carry a lot in the panniers. Dont underestimate the tyres, I had a similar experience and tyre pressure was my problem. Ended up inflating them to higher than recommended to make it diesappear. I also repalced head bearings, was like a new bike. But before even looking at too much tyres and fork seals must be good.....do them first. Front tyres seem to wear in funny patterns.


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1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 37,190 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 42,640 miles.

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

10Back to top Go down   Leaning it over Empty Re: Leaning it over Thu May 16, 2013 11:57 am

JimK

JimK
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Thanks very much for all the fine advice/input.

Haven't been able to respond individually yet due to a crazy work schedule.
Work/Sleep, Work/Sleep, etc. Very Happy
I was wrong...have a Koni shock.

Anyway...will address all the ideas stated...soonest.

You folks are Great, and appreciate the helpful ideas.

Best,

Jim


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'89 k100 rs se
    

11Back to top Go down   Leaning it over Empty Re: Leaning it over Thu May 16, 2013 1:40 pm

twincarb

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@RT wrote:My handling was similar but changed completely with new fork oil and new Sports Demon tyres and firmer setting on the rear shock.

+1 When I first got my K she wallowed in bends draining the fork oil and putting new in sorted her out. if the levels in both sides aren't the same that would cause a difference in handling as well


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BMW K100LT 1988 Matt Black Peugeot Electra Blue (ELX) Colour is now confirmed...
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Triumph Spitfire (not a bike but hell it's British chaps)
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