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    how to test speedo sensor on Wed Aug 10, 2016 7:18 am

Ian Drinky

avatar
active member
active member

  • My speedo has stopped working after removing the rear drive and changing the oil, how do you test the sensor on my 1983 k 100

    

2Back to top Go down    Re: how to test speedo sensor on Wed Aug 10, 2016 7:52 am

92KK 84WW Olaf

avatar
Life time member
Life time member
Any chance it got pulled a little and got pulled out of the connector into the loom that's rear of the air box? Just follow the wire up....

Happened mine.....


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

3Back to top Go down    Re: how to test speedo sensor on Wed Aug 10, 2016 7:59 am

GTJos

avatar
Silver member
Silver member
Very Happy Hi Ian !
There are several topics on this forum about the issue; just make a search for 'speedo sensor'.
Often it is a loose (or corroded) connector.
Good luck..


__________________________________________________
Ich bin enge Kirchröatsjer jong; adieë wa ?! 
                                1992  K1100LT 6458188
                                1986 K100RS 0085647 + sidecar Velorex 562
                                1985  K100RT  0027026
    

4Back to top Go down    Re: how to test speedo sensor on Wed Aug 10, 2016 8:25 am

RicK G

avatar
VIP
VIP
You can use an electric soldering iron the 50hz gives a signal of 100 pulses per secons which is 61KPH.
Hold the iron element area not the tip very close to the bottom of the sensor when it is out of the rear drive


__________________________________________________
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
    

5Back to top Go down    Re: how to test speedo sensor on Wed Aug 10, 2016 10:43 am

duck

avatar
Life time member
Life time member
RicK G wrote:You can use an electric soldering iron the 50hz gives a signal of 100 pulses per secons which is 61KPH.
Hold the iron element area not the tip very close to the bottom of the sensor when it is out of the rear drive

This varies by soldering iron. Before I started using Karumba I found that some soldering irons put out a sufficient magnetic field while some do not.


__________________________________________________
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    Re: how to test speedo sensor on Thu Aug 11, 2016 7:21 am

Dai

avatar
Life time member
Life time member
If you have a good multimeter, switch it to the 'less than one volt AC' setting. Unplug the speedo sensor under the relay box (may be easy to get at under the righthand sidepanel - it's a two-pin connector with a brown and yellow wire) and put the multimeter probes in the socket. Start the bike up and pull it through the gears by hand - if the pickup is behaving itself you'll see the voltage climb from zero to about 0.245 volts AC in top gear at about 3000rpm. Just make sure the rear tyre isn't in contact with the ground! Very Happy


__________________________________________________
'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)
    

7Back to top Go down    Re: how to test speedo sensor on Thu Aug 11, 2016 7:35 am

92KK 84WW Olaf

avatar
Life time member
Life time member
As Dai says...but the rear brake switch connector is similar and nearby so trace the wire all the way up to the connector.


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

8Back to top Go down    Re: how to test speedo sensor on Thu Aug 11, 2016 11:05 am

Inge K.

avatar
VIP
VIP
The rear brake switch connector have round pins.
The speedo sensor connector have flat pins arranged as a T.


__________________________________________________
Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

9Back to top Go down    Re: how to test speedo sensor on Thu Aug 11, 2016 11:51 am

92KK 84WW Olaf

avatar
Life time member
Life time member
Inge K. wrote:The rear brake switch connector have round pins.
The speedo sensor connector have flat pins arranged as a T.

Thanks Inge. Owe you a lot of beers so you need to start planning a trip over here some time.! They didn't call me Olaf for nothing.


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

10Back to top Go down    Re: how to test speedo sensor on Thu Aug 11, 2016 12:19 pm

Ringfad

avatar
Life time member
Life time member
92KK 84WW Olaf wrote:
Inge K. wrote:The rear brake switch connector have round pins.
The speedo sensor connector have flat pins arranged as a T.

Thanks Inge. Owe you a lot of beers so you need to start planning a trip over here some time.! They didn't call me Olaf for nothing.


Just checked Flights from Rygge to Dublin (return) -  €34 in September.

I will probably spend more on fuel during the weekend run.

There is always a bed for Inge in Dublin (and maybe a few )


__________________________________________________


   ;BMW; K100RS Style Black 1987 101K Km     ;BMW; K1 Black 1993 50K Km     ;BMW; K1100RS Red 1993 60k miles  ;BMW; K100 16V Black (ex ElectricMonk)
    

11Back to top Go down    Re: how to test speedo sensor on Thu Aug 11, 2016 4:21 pm

92KK 84WW Olaf

avatar
Life time member
Life time member
Inge what are you waiting for now?

We know beer is much cheaper here so I guess at 8 pints you will be at break even.!!!


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

12Back to top Go down    Re: how to test speedo sensor on Fri Aug 12, 2016 1:15 pm

Two Wheels Better

avatar
Moderator
Moderator
One alternate method is to place a 9V battery between thumb (+) and forefinger (-) of your left hand whilst sticking your tongue into the connector of the speedo sensor. If it does nothing for you it's not your fault.  Wink


__________________________________________________
 

'77 R75/7-1000cc, '87 K100RS, '93 K12 Big Block, '94 R100 Mystic, '03 K1200GT, '04 R1150RT, '06 K1200R, '07 K1200R & '09 K1300GT
    

13Back to top Go down    Re: how to test speedo sensor on Fri Aug 12, 2016 6:53 pm

Dai

avatar
Life time member
Life time member
He's on the forkxxxx already... Twisted Evil


__________________________________________________
'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)
    

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