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1Back to top Go down    Rear Wheel Speed Sensor on Sat Apr 17, 2010 10:40 pm

otto59


Silver member
Silver member
When I removed the speed sensor on my 1985 K100 RT to clean it one of the wires had come off. I re-soldered it and now I get nothing on the speedo. Checked for and had continuity on the wires and connection, connection is clean. Is there a way to test the sensor, maybe I applied too much heat to it while soldering? Anyone have one for sale?


2Back to top Go down    Re: Rear Wheel Speed Sensor on Sat Apr 17, 2010 11:35 pm

blaKey


Life time member
Life time member
I read somewhere that you take a working (switched on) soldering iron and place it real close to the sensor. It picks up the oscillating magnetic field of the soldering iron.

I just tried it on my bike (ignition on, as if you are about to start the bike) and the needle of the speedo sat just under 70 kilometres per hour.

So depending on your soldering iron, you'll at least see if the sensor is working or not.

I hope this helps.


__________________________________________________
Neil
K100RS 1986
K100RT 1987
Riding anything is better than riding nothing.

3Back to top Go down    Re: Rear Wheel Speed Sensor on Sun Apr 18, 2010 7:52 am

ReneZ


Life time member
Life time member
Did you also clean the connector behind the right side cover?

Indeed you can test it with a soldering iron or some transformers. Just keep the sensor close to them and it should be picking up the changing electric magnetic field.

Soldering iron test
@ 50Hz60.30Km/u37.48MpH
@ 60Hz72.36 44.97


__________________________________________________
Greetings from Florida! Having a 'new' K cyclops Bike1

Rene


BMW K100 - 1985 (0030029)

4Back to top Go down    Re: Rear Wheel Speed Sensor on Sun Apr 18, 2010 12:28 pm

otto59


Silver member
Silver member
Checked and cleaned the connector behind the panel. I re-soldered both connections and still no go. I suspect one of the fine copper wires that go from the terminal down into the sensor body is broken. Impossible to see let alone solder. My hunt for a new (or used) sensor begins!


5Back to top Go down    Re: Rear Wheel Speed Sensor on Sun Apr 18, 2010 1:53 pm

ReneZ


Life time member
Life time member
Otto, take a resistance measurement. It should be around 3kOhm IIRC. No resistance is an open circuit.


__________________________________________________
Greetings from Florida! Having a 'new' K cyclops Bike1

Rene


BMW K100 - 1985 (0030029)

6Back to top Go down    Re: Rear Wheel Speed Sensor on Mon Apr 19, 2010 11:34 pm

otto59


Silver member
Silver member
"0" resistance - open circuit - sensor will make a great fishing weight!


7Back to top Go down    Re: Rear Wheel Speed Sensor on Tue Apr 20, 2010 2:00 am

K-BIKE


Life time member
Life time member
Bad luck!
Regards,
K-BIKE


8Back to top Go down    Re: Rear Wheel Speed Sensor on Wed Apr 21, 2010 12:25 am

otto59


Silver member
Silver member
Bad and good luck! Have had no problems finding one. Have found 3 for under 40 bucks here in North America!


9Back to top Go down    Re: Rear Wheel Speed Sensor on Wed Apr 21, 2010 2:06 pm

ReneZ


Life time member
Life time member
Let us know how you fare after fitting the replacement part. Cheers!


__________________________________________________
Greetings from Florida! Having a 'new' K cyclops Bike1

Rene


BMW K100 - 1985 (0030029)

10Back to top Go down    Re: Rear Wheel Speed Sensor on Thu Apr 29, 2010 11:30 am

Crazy Frog


admin
admin
ReneZ wrote:Did you also clean the connector behind the right side cover?

Indeed you can test it with a soldering iron or some transformers. Just keep the sensor close to them and it should be picking up the changing electric magnetic field.

Soldering iron test
@ 50Hz60.30Km/u37.48MpH
@ 60Hz72.36 44.97

Here is some additional information:


__________________________________________________

1986 k75, 1985 K100rt,1985 K100rt/EML sidecar.

11Back to top Go down    Re: Rear Wheel Speed Sensor on Thu Apr 29, 2010 6:32 pm

blaKey


Life time member
Life time member
Crazy Frog...where do you get this stuff from?


__________________________________________________
Neil
K100RS 1986
K100RT 1987
Riding anything is better than riding nothing.

12Back to top Go down    Re: Rear Wheel Speed Sensor on Thu Apr 29, 2010 6:40 pm

Crazy Frog


admin
admin
I speak French and English and understand some Spanish and Italian. Oh I also learned German as a second language when in High school.
By the way I learned English when I was 30 years old. As I always say I spoke only 3 words of English when I moved in Nova Scotia (Yes, No and F...ck)What a Face
The best way to learn a foreign language is to find a foreign girl friend. The English one became my wife!
Once in a while, I check other international forums.
I also share my finding on these too.
This is a give and take opportunity.


__________________________________________________

1986 k75, 1985 K100rt,1985 K100rt/EML sidecar.

13Back to top Go down    Re: Rear Wheel Speed Sensor on Thu Apr 29, 2010 6:50 pm

blaKey


Life time member
Life time member
"The best way to learn a foreign language is to find a foreign girl friend"
Can I get a note from you for my wife explaining that Neil wants to learn another language?

"I also share my finding on these too"
A lot of people on this forum thank you for your efforts every day!


__________________________________________________
Neil
K100RS 1986
K100RT 1987
Riding anything is better than riding nothing.

14Back to top Go down    Re: Rear Wheel Speed Sensor on Thu Apr 29, 2010 7:10 pm

Crazy Frog


admin
admin
Neil,

Your note is in the mail and you are invited to Canada to learn as many languages as you want.
We are a multi cultural society and try to live happy all together.
The street where I live was a dead end street with only 9 houses. We had people from 6 different origin (and language) living in these 9 houses.
We had (and still have) very interesting parties when we meet and everybody bringing food (and drink) from their country of origin. I spent a lot of time with the Scottish because...... they always have the best scotch.


__________________________________________________

1986 k75, 1985 K100rt,1985 K100rt/EML sidecar.

15Back to top Go down    Re: Rear Wheel Speed Sensor on Fri Apr 30, 2010 1:12 pm

ReneZ


Life time member
Life time member
I knew there was a good reason to move from Nova Scotia to Scotland!


__________________________________________________
Greetings from Florida! Having a 'new' K cyclops Bike1

Rene


BMW K100 - 1985 (0030029)

16Back to top Go down    Re: Rear Wheel Speed Sensor on Fri Apr 30, 2010 5:07 pm

K-BIKE


Life time member
Life time member
For hospitality I have not found better than a Scottish Constitution Masonic Lodge on Burns Night where complete with the skirl of the Bagpipes as the Haggis is ceremonially brought in and the Address to the Haggis, much Scotch is consumed. In my mind right now I can hear my friend Jock Mackie deliver his excellent rendering of the Address - Happy Days.
Regards,
K-BIKE

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