BMW K bikes (Bricks)

You are not connected. Please login or register

View previous topic View next topic Go down  Message [Page 1 of 1]


1Back to top Go down   lean angle Empty lean angle on Sat Apr 18, 2015 1:25 am

Stan

Stan
Life time member
Life time member
Wise people........or members of the forum. I have 2 Ks..1983 and 1987. The lean angle on the side stand of the 83 is really starting to concern me. It was not an issue untill I got the 87 and did a comparison. Both stands seem to be the same length and shape but the 83 looks as though it is in danger of falling over. There are many minute differences between the two and I assumed this was another....but it is looking on the dangerous side...side stand that is.


__________________________________________________
1983 K100 basic vin 0003960 colour red  GONE
1987 K100RT vin 0094685 colour, orange peel, sorry, pearl..GONE
F800R black
    

2Back to top Go down   lean angle Empty Lean Angle on Sat Apr 18, 2015 1:40 am

Tom KSR

Tom KSR
Life time member
Life time member
G'day Ainsjac, I have a 93 K75 and the recently completed yellow beast an 86K100RS. The leaning angle on the 75 is much less than that of the K100. It seems the stands are the same but the leaning angle on the K100 is a worry. It may be the side stand bush on the 100 has worn more. Cheers Tom

    

3Back to top Go down   lean angle Empty Re: lean angle on Sat Apr 18, 2015 3:05 am

RicK G

RicK G
admin
admin
The bolt and bush do wear very badly which is most likely the problem. My K1100 is getting really bad and looks like it's going to fall over.


__________________________________________________
"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
    

4Back to top Go down   lean angle Empty Re: lean angle on Sat Apr 18, 2015 3:38 am

charlie99

charlie99
VIP
VIP
stan

the bolt holds the bush in place internally by clamping force between the two arms of the side stand ...if you have evidence that the bolt is worn ...then I suspect it has loosened allowing the bush to move about ...quite likely event

the stand itself interfaces to the tang that comes out of the base of the side-centre stand bracket ...the two arms on the side stand are the limit that the bush can move up and down in ...

what I have found is that the hole that the bush fits through wears a slight bit ...which in turn lets the angle of the sidestand change ...and wears the profile of the bush outer where it goes through the tang . remember that the bush should be the same or just slightly thicker than the tang ..not 1/2  a mm bigger in height ...maybe just a few thou .


the arms can wear the tang slightly and the arms also them selves ...over time allowing for a bigger gap between the arms and the tang allowing for sidestand lean

I think I mentioned this before

what I did was to grind - file about 1/2 a mm off the height of a new pivot bush ( so it had very little slop at all in its profile through the tang in both diameter and height ) which then let the arms of the sidestand pull closer to the tang with the standard pivot bolt ...letting far less movement happen at all in a verticle nature

I do have some pics somewhere ....did it a long time ago now ...and the lean angle has been far better since ...with little deterioration in that angle at all ... and sits more upright all the time  

ill try and find them ...but suspect the pics have been archived by now (on another computer )


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%Olean angle Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

5Back to top Go down   lean angle Empty Re: lean angle on Sat Apr 18, 2015 4:01 am

Stan

Stan
Life time member
Life time member
Thanks gentlemen. I will pull said bits apart in the next few days. The bush in the orange one was renewed a few months ago....but I think the problem with it was the missing boomerang shaped plate that held the springs in place.


__________________________________________________
1983 K100 basic vin 0003960 colour red  GONE
1987 K100RT vin 0094685 colour, orange peel, sorry, pearl..GONE
F800R black
    

6Back to top Go down   lean angle Empty Re: lean angle on Sat Apr 18, 2015 4:07 am

charlie99

charlie99
VIP
VIP
the boomerang plate has little to do with the lean angle stan ....more to do with retract only


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%Olean angle Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

7Back to top Go down   lean angle Empty Re: lean angle on Sat Apr 18, 2015 6:03 am

92KK 84WW Olaf

avatar
Life time member
Life time member
When I got the 874 K100RT I had a little fun with that boomerang thingy. I took the bike for a test ride and the handling felt a bit off so I decided to put air in the tyres. Stopped and tried to put down the side stand and the damn thing wouldn't go down. Kept springing back up. I couldn't get off the bike. I gave up and went back to the seller and told him I couldn't get off the bike so he held the stand down while I got off. Anyway I did a deal but only if he could sort that little problem. There was a pin or bolt that the boomerang wrapped around and this causes it to retract when the weight is off the stand. He had to go find a hacksaw to cut it. Then it would stay down.

The later ones have a different arrangement, pull the clutch lever and the stand retracts. Much better.

If it becomes a worry there is a rubber attachment you can get that leaves a rubber 'prong' to alert you or push the stand back if you ride off with it down, there is one on my sons bike.
Check if you are buying some used parts as I think there was a change in the stands around 1986 and I don't think all parts are interchangeable.


__________________________________________________
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.
    

8Back to top Go down   lean angle Empty Lean Angle on Sat Apr 18, 2015 6:13 am

Tom KSR

Tom KSR
Life time member
Life time member
G'day All, After my last post I measured the vertical distance between the two side stand 'bases'. The K75 measured about 110mm and the K100 measured about 125mm - quite a difference in the leaning department. So, I reckon worn bushes are the answer. Cheers Tom

    

9Back to top Go down   lean angle Empty Re: lean angle on Sat Apr 18, 2015 9:31 pm

Stan

Stan
Life time member
Life time member
Pulled the stand off and found part of the problem.lean angle Img_1510


__________________________________________________
1983 K100 basic vin 0003960 colour red  GONE
1987 K100RT vin 0094685 colour, orange peel, sorry, pearl..GONE
F800R black
    

10Back to top Go down   lean angle Empty Re: lean angle on Sat Apr 18, 2015 9:34 pm

Stan

Stan
Life time member
Life time member
Another view...will straighten it tomorrow and get a new bush.
lean angle Img_1511


__________________________________________________
1983 K100 basic vin 0003960 colour red  GONE
1987 K100RT vin 0094685 colour, orange peel, sorry, pearl..GONE
F800R black
    

11Back to top Go down   lean angle Empty Re: lean angle on Sat Apr 18, 2015 9:58 pm

RicK G

RicK G
admin
admin
This is a new stand
lean angle Side_s10


__________________________________________________
"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
    

12Back to top Go down   lean angle Empty Re: lean angle on Sat Apr 18, 2015 10:07 pm

charlie99

charlie99
VIP
VIP
that's how they come

not saying it hasn't bent a little further ...but the bend is standard
lean angle 2013-111


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%Olean angle Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

13Back to top Go down   lean angle Empty Re: lean angle on Sun Apr 19, 2015 12:01 am

Stan

Stan
Life time member
Life time member
I am now a little confused. I have looked at my orange bike and the stand and it is of a slightly different design ( the head that attaches to the bike) and has been modified with a welded bit.
lean angle Img_1512


__________________________________________________
1983 K100 basic vin 0003960 colour red  GONE
1987 K100RT vin 0094685 colour, orange peel, sorry, pearl..GONE
F800R black
    

14Back to top Go down   lean angle Empty Re: lean angle on Sun Apr 19, 2015 12:05 am

Stan

Stan
Life time member
Life time member
lean angle Img_1514


__________________________________________________
1983 K100 basic vin 0003960 colour red  GONE
1987 K100RT vin 0094685 colour, orange peel, sorry, pearl..GONE
F800R black
    

15Back to top Go down   lean angle Empty Re: lean angle on Sun Apr 19, 2015 12:06 am

Stan

Stan
Life time member
Life time member
lean angle Img_1515
There is no bend at all on the orange bike stand.


__________________________________________________
1983 K100 basic vin 0003960 colour red  GONE
1987 K100RT vin 0094685 colour, orange peel, sorry, pearl..GONE
F800R black
    

16Back to top Go down   lean angle Empty Re: lean angle on Sun Apr 19, 2015 1:03 am

charlie99

charlie99
VIP
VIP
that's a fairly large brace welded under the stand arm stan

and it doesn't look like the normal bmw supplied pivot bush

I wonder has some one redrilled and modified the bracket - and pivot bush off the centre stand chassis ?


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%Olean angle Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

17Back to top Go down   lean angle Empty Re: lean angle on Sun Apr 19, 2015 3:48 am

Stan

Stan
Life time member
Life time member
The pivot bushes are the same sizes. Orange bike has the best angle sitting on the side stand and I want the red to be the same. Tomorrow I will catch up with a mate and a press to straighten up the stand and get a bush made up. There is little wear in the bush...in comparison to the old bush on the orange bike..which was changed a few months ago. Should I weld a brace Charlie? I only use the side to stop and get off...always onto the centre stand...too many unimpressed people who cop the smoke if I leave it on the side.


__________________________________________________
1983 K100 basic vin 0003960 colour red  GONE
1987 K100RT vin 0094685 colour, orange peel, sorry, pearl..GONE
F800R black
    

18Back to top Go down   lean angle Empty Re: lean angle on Sun Apr 19, 2015 5:34 am

charlie99

charlie99
VIP
VIP
sounds like a plan stan

yeah go for the brace as well if you straighten the leg of the stand ... I have a feeling that the bent leg is all about geometry and strength for the materials used

you might remember that I went to the k1100 type stand ...and I would consider that the angle of the bracket had changed just slightly

something that might prove hard to replicate to a k100 subchassis under the gearbox (I guess there is some heat involved in getting the angles to lineup )   and then tempering to get it back to "whats right " with adequate strength after .

just hope it lines up with the side stand and centre stand rubbers on the exhaust bracket to stop vibration


don't forget the bush can be too wide thick for the bracket ...measure it ...and if not, file to suit for a close fit.
 I remember having about 100 mm of movement vertically whilst deployed in the sidestand unloaded to loaded ...and have got that back to about 30 mm or so


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%Olean angle Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

19Back to top Go down   lean angle Empty Re: lean angle on Sun Apr 19, 2015 3:23 pm

sidecar paul

sidecar paul
Life time member
Life time member
Do you remember this post, Stan?

https://www.k100-forum.com/t3452-permanent-side-stand-puck

All the pictures have disappeared, but it was basically a block screwed to the bottom of the stand foot.

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!
    

20Back to top Go down   lean angle Empty Re: lean angle on Sun Apr 19, 2015 5:42 pm

Stan

Stan
Life time member
Life time member
Yes Paul I do remember the puck solution. Should know a bit more about the straighted solution soon. I wonder how many stands bend a little over time...mine is 32 years old and I can only account for the last 15 years. Obviously the previous owner of my other bike had an issue and welded a brace.


__________________________________________________
1983 K100 basic vin 0003960 colour red  GONE
1987 K100RT vin 0094685 colour, orange peel, sorry, pearl..GONE
F800R black
    

21Back to top Go down   lean angle Empty Re: lean angle on Mon Apr 20, 2015 10:18 pm

Stan

Stan
Life time member
Life time member
New bush, straight stand...feels safer.
lean angle Img_1516


__________________________________________________
1983 K100 basic vin 0003960 colour red  GONE
1987 K100RT vin 0094685 colour, orange peel, sorry, pearl..GONE
F800R black
    

22Back to top Go down   lean angle Empty Re: lean angle on Tue Apr 21, 2015 4:49 am

charlie99

charlie99
VIP
VIP
woohoo !


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%Olean angle Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

23Back to top Go down   lean angle Empty Re: lean angle on Tue Apr 21, 2015 8:07 am

88

88
Life time member
Life time member
@charlie99 wrote:stan

what I did was to grind - file about 1/2 a mm off the height of a new pivot bush ( so it had very little slop at all in its profile through the tang in both diameter and height ) which then let the arms of the sidestand pull closer to the tang with the standard pivot bolt ...letting far less movement happen at all in a verticle nature

I'm going to try that The jaws of mine are definitely splayed from wear. I've tried squeezing them in the vice and even building up the inside with weld then filing it back, neither solution last very long.


__________________________________________________
lean angle Ir-log11 88....May contain nuts!lean angle 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!

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

View previous topic View next topic Back to top  Message [Page 1 of 1]

Permissions in this forum:
You cannot reply to topics in this forum