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1Back to top Go down   faulty speedometer Empty faulty speedometer Tue Jan 12, 2016 6:06 am

Holister

Holister
Life time member
Life time member
Over the last week I've noticed my speedo needle randomly waving about like a flag in a gentle breeze. I could be doing 80kph and the needle falls down to 40 and back up to 60 and falls again. It's never higher than my actual speed.

The odo is working perfectly. I've checked a couple of lengthy trips against Google maps and its spot on so I doubt there's anything wrong with the pick-up on the rear wheel or any of the wiring from there to the instruments. It's got to be in the speedo mechanism itself.

While I've had the instrument pod part to change globes and dry it out on the odd occasion, I've never delved into the mechanics of the speedo.

The instruments, in all other respects have been working faultlessly up till now.
Any suggestions as to what might be the problem before I go pulling it apart?


__________________________________________________

1989 K100RT     VIN  0097367 (naked)  
1996 K1100RS   VIN  0451808
  faulty speedometer Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

2Back to top Go down   faulty speedometer Empty Re: faulty speedometer Tue Jan 12, 2016 6:42 am

Chocolate

Chocolate
Life time member
Life time member
Hey!

The same issue occurred with my speedo.
Cleaning the connections helped.

Three places you could clean.

1.) the sensor at the rear drive

2.) the cable connection at the right side, where the plate with the frame number is.
faulty speedometer <a href=faulty speedometer Image28" />

3.) the speedo it self needs some cleaning, many screws but easy to take apart, could be moisture, put it on the heating for an hour.
You don't have to take everything apart, just open and use carful some DeoxIT Contact Cleaner.
faulty speedometer 63_brotdose

Cheers


__________________________________________________
Only a few activities make me experience my senses in a way motorcycle riding does, it is like swimming in the nude in a river.
K75 BA/1992 ABS, K75 BA/1991 noABS, Ducati, Mobylette M1/1973
    

3Back to top Go down   faulty speedometer Empty Re: faulty speedometer Tue Jan 12, 2016 6:56 am

Dai

Dai
Life time member
Life time member
KH: as Espresso says, don't assume it's a mechanical fault. LFB pulls the same stunt on occasions; disconnecting and reconnecting the PCBs fixes it for another year or so i.e. it sounds like light corrosion.


__________________________________________________
1983 K100 upgraded to K100RS spec, 1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

4Back to top Go down   faulty speedometer Empty Re: faulty speedometer Tue Jan 12, 2016 7:22 am

Holister

Holister
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Life time member
The odo is working fine so its getting correct signals from the sensor. It can't be anything external to the pod.
I'll give the PCB contacts a spray with cleaner. I have done quite a few hours of wet weather riding over the last few weeks, some of it torrential and the front is naked. Not seen any condensation inside tho... as is usual after a ride in the rain.
Cheers


__________________________________________________

1989 K100RT     VIN  0097367 (naked)  
1996 K1100RS   VIN  0451808
  faulty speedometer Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

5Back to top Go down   faulty speedometer Empty Re: faulty speedometer Tue Jan 12, 2016 4:23 pm

smithy

smithy
Life time member
Life time member
If you tap the face of the speedo while it's waving around, does it come back to normal?
I suspect corrosion either in the main plug into the unit or one of the three plugs under the speedo it's self.
faulty speedometer Speedo10


__________________________________________________
87 K100rs : Vin 9462 
86 K100rt : Vin 9901
Naked
98 K1100lt: Vin 8044
    

6Back to top Go down   faulty speedometer Empty Re: faulty speedometer Tue Jan 12, 2016 5:29 pm

Rockman

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On the same topic, where do I get odometer gears?

    

7Back to top Go down   faulty speedometer Empty Re: faulty speedometer Tue Jan 12, 2016 7:17 pm

RicK G

RicK G
admin
admin
@Rockman wrote:On the same topic, where do I get odometer gears?
http://www.speedometergears.com/bmw-mercedes-odometer-gears

http://www.repairsonly.com.au/index.html

try these Phil


__________________________________________________
"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 2004 K1200GT 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

8Back to top Go down   faulty speedometer Empty Re: faulty speedometer Tue Jan 12, 2016 7:44 pm

Stan

Stan
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If it is the small main drive gear..you can get it with a few other gears from Jaycar..total cost about $8 as opposed to at least $25 for that one gear alone.


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

9Back to top Go down   faulty speedometer Empty Re: faulty speedometer Wed Jan 13, 2016 10:33 pm

K75cster

K75cster
Life time member
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Kaptain, I'd expect the needle to be more sensitive to signal than the odo, but that in itself would lead me to check the connections for corrosion.
Intermittent signal loss and intermittent signal decay or waning would show up at the needle mostly and would lead me to check for continuity.


__________________________________________________
Keith - 1987 K75c with r100rt replica fairing and half of a 1984 K100rt 1992 K1100LT a blue one

The Clever are adept at extricating themselves from situations that the wise would have avoided from the outset - QUOTE from david Hillel in Out of the Earth.
    

10Back to top Go down   faulty speedometer Empty Re: faulty speedometer Wed Jan 13, 2016 10:42 pm

charlie99

charlie99
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VIP
mine did the same nigel

try cleaning up the speedo sensor cable connector  at the connection at right hand side cover

mine starts playing up periodically after a wet weather ride ....but a few weeks - months later

deoxit helps


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

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%Ofaulty speedometer 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 ..
    

11Back to top Go down   faulty speedometer Empty Re: faulty speedometer Thu Jan 14, 2016 12:17 am

Holister

Holister
Life time member
Life time member
@smithy wrote:If you tap the face of the speedo while it's waving around, does it come back to normal?
I suspect corrosion either in the main plug into the unit or one of the three plugs under the speedo it's self.
Thanks for the pic smithy. That'll make it easier to find the coections.Tapping makes no difference. 

Keith/Charlie. I understand what you're saying there. Will investigate further. Just haven't had time to scratch myself since I got back from up North last w/e. And now can't find my DeoxIT. Must be still in my storage shed.

Cheers


__________________________________________________

1989 K100RT     VIN  0097367 (naked)  
1996 K1100RS   VIN  0451808
  faulty speedometer Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

12Back to top Go down   faulty speedometer Empty Re: faulty speedometer Thu Jan 14, 2016 3:45 pm

sidecar paul

sidecar paul
Life time member
Life time member
Oh, just take out a mortgage and buy another bottle! faulty speedometer 652573


__________________________________________________
'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!
    

13Back to top Go down   faulty speedometer Empty Re: faulty speedometer Thu Jan 14, 2016 4:54 pm

Holister

Holister
Life time member
Life time member
Laughing
Yes, its grossly overpriced in my opinion.

I just wounder if CLR (Calcium Lime Rust)  would do the same. It cleans up tarnished metal ok. Then flush it out and squirt with WD40...??


__________________________________________________

1989 K100RT     VIN  0097367 (naked)  
1996 K1100RS   VIN  0451808
  faulty speedometer Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

14Back to top Go down   faulty speedometer Empty Re: faulty speedometer Sat Jan 16, 2016 9:05 am

Holister

Holister
Life time member
Life time member
Espresso, Keith, charlie... Spot on. Looks like it was the connector r/h rear of tank. Gave it a clean with brake cleaner (isopropyl alcohol), jiggled it in and out a few times and it looks like all is good in K-world again. It was a bit dirty and it seems a bit loose so I'll need to do some maintenance on that connector sooner than later.

Keith, looks like you may be right. It seems the needle may be more sensitive to random signal fluctuations than the odo.

Cheers


__________________________________________________

1989 K100RT     VIN  0097367 (naked)  
1996 K1100RS   VIN  0451808
  faulty speedometer Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

15Back to top Go down   faulty speedometer Empty Re: faulty speedometer Mon Jan 18, 2016 4:03 am

Basic2

Basic2
Platinum member
Platinum member
@RicK G wrote:
@Rockman wrote:On the same topic, where do I get odometer gears?
http://www.speedometergears.com/bmw-mercedes-odometer-gears

http://www.repairsonly.com.au/index.html

try these Phil

The odometer & trip meter stopped working on the 100/2. Took it to Repairs Only and it was fixed in 2 days. 4 damaged gears replaced. Gears are from Odometergears.

Richard.


__________________________________________________
K100 Basic 2
11/1987 6308319K100CJ
Marakesh Red
    

16Back to top Go down   faulty speedometer Empty faulty speedometer Tue Jan 19, 2016 12:13 pm

Mike Bergenstein

Mike Bergenstein
active member
active member
Just in time guys! My Speedo has been acting up and finally quit working. It would work up to 40 mph and lock up.It would not indicate more than 40 but worked fine under. Well,it stopped altogether now. I now know what to look for before pulling it. Thanks forum!


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Mike From sunny Florida
    

17Back to top Go down   faulty speedometer Empty Re: faulty speedometer Wed Jan 27, 2016 5:56 am

six1

six1
VIP
VIP
Maybe Speedometer disc is warped...

    

18Back to top Go down   faulty speedometer Empty Re: faulty speedometer Wed Jan 27, 2016 6:22 am

Basic2

Basic2
Platinum member
Platinum member
@Mike Bergenstein wrote:Just in time guys! My Speedo has been acting up and finally quit working. It would work up to 40 mph and lock up.It would not indicate more than 40 but worked fine under. Well,it stopped altogether now. I now know what to look for before pulling it. Thanks forum!

Have a look at the magnetic pickup in the final drive. Take it out and check if there are any metal particles stuck to it.


__________________________________________________
K100 Basic 2
11/1987 6308319K100CJ
Marakesh Red
    

19Back to top Go down   faulty speedometer Empty Re: faulty speedometer Wed Jan 27, 2016 1:33 pm

Crazy Frog

Crazy Frog
admin
admin
And if you remove the speed sensor, if you put a soldering gun to its proximity, the speedo needle shoud start to move.
BUT.....
Sixt1 just released the latest version of Karamba.
You just have to manufacture a piece of wire with a 3.5" jack and plug your computer on the bike. You will see right away if you have a problem with the speedo/connections or if the problem is the sensor.


__________________________________________________
faulty speedometer Frog15faulty speedometer Logo2101986 k75, 1985 K100rt, 1985 K100rt/EML GT2 sidecar, 1999 K1200lt/Hannigan Astro Sport sidecar.
    

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