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Author Topic: K100RS parked for four months outside in all weathers  (Read 314420 times)

Offline The Mighty Gryphon

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Re: K100RS parked for four months outside in all weathers
« Reply #200 on: January 14, 2017, 10:25:01 AM »
Is the needle still stuck on 22mph?   Chances are good the faceplate has wrinkled.  I suspect this will be a problem in your part of the world.  Even in the cooler latitudes I notice a little bit of buckling on hot summer days.  Now, when I park I leave my gloves on top of the instruments to keep the sun off the faceplates.

When you get into the instrument cluster, it will be a good time to calibrate the speedo.  There are a lot of good threads and information here and on other forums.  If you have the skills with a soldering iron and good eyes, you can also change the clock to 12 hour display.  Then there is the opportunity to change the bulbs in there to LED's.

Also, Before you do anything with the cluster, check the speed sensor connector that is located on the right side of the bike near the rear brake fluid reservoir.  Clean it and do some continuity checks down to the sensor and up to the cluster.
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  • In my garage in Marilla, NY
  • '91K100RS White/Blue
Current:
'91 K100RS16V "Moby Brick Too"

Past:
'94 K75RT "Ilsa, She Wolf of the SS"
'92 K100RS16V "Moby Brick" (RIP, deceased in a vehicular assault)
'94 K75S Special Edition Dakar Yellow "Cheetos"
'89 K100RS Special Edition "Special Ed"

Offline Filmcamera

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Re: K100RS parked for four months outside in all weathers
« Reply #201 on: January 14, 2017, 10:55:32 AM »
I have checked and rechecked the sensor, as far as I can tell it is connected fine.  The loom is one I installed after buying the bike and everything works on it great so if there is a problem with continuity I am going to assume it is from the sensor, two looms with bad connections from speedo sensor seems too much of a coincidence.


The connection IS broken at the sensor end but as far as I can see the spades connect up well.


I took the instrument cluster apart and reset the needle to 0, it seems to move freely and isn't touching the plastic faceplate or the speedo backing.


Put it all back together and still nothing.


When I cleaned the pins in the cluster they were totally corrosion free so I am thinking my next step is a new (to me at least) speedo sensor and take it from there. 


Meanwhile I will put the fairing back on and continue to ride and rely on a GPS speedo from my phone.


BTW I am blind as a bat and a gorilla in boxing gloves can probably solder bet than me so I will leave the clock alone....

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  • San Jose, Costa Rica
  • 1991 K100RS 16v ABS1, 2022 Triumph Tiger 900 Rally Pro
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Offline Laitch

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Re: K100RS parked for four months outside in all weathers
« Reply #202 on: January 14, 2017, 11:01:47 AM »
Quote from: Filmcamera on January 14, 2017, 10:55:32 AM
The connection IS broken at the sensor end but as far as I can see the spades connect up well.
The sensor can have an internal break so replacing it makes sense. Your cleaned and checked instrument cluster is certainly ready to utilize it.
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  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

Offline The Mighty Gryphon

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Re: K100RS parked for four months outside in all weathers
« Reply #203 on: January 14, 2017, 11:45:31 AM »
eBay is your friend.  $25 with free shipping. 

I checked the numbers and it's a fit.  P/N 61 31 2 305 839

http://www.ebay.com/itm/2000-BMW-K1200-RS-Speed-Sensor-160044-/322350237151?hash=item4b0d9245df:g:uacAAOSwj85YRdTv&vxp=mtr
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  • In my garage in Marilla, NY
  • '91K100RS White/Blue
Current:
'91 K100RS16V "Moby Brick Too"

Past:
'94 K75RT "Ilsa, She Wolf of the SS"
'92 K100RS16V "Moby Brick" (RIP, deceased in a vehicular assault)
'94 K75S Special Edition Dakar Yellow "Cheetos"
'89 K100RS Special Edition "Special Ed"

Offline Laitch

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Re: K100RS parked for four months outside in all weathers
« Reply #204 on: January 14, 2017, 12:36:24 PM »
Quote from: Laitch on January 14, 2017, 11:01:47 AM
The sensor can have an internal break . . .
but it could also just be a break in a wire somewhere between the sensor and the connector.
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  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

Offline The Mighty Gryphon

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Re: K100RS parked for four months outside in all weathers
« Reply #205 on: January 14, 2017, 01:17:46 PM »
With the molded in pickup coil, the problem, if it is a broken wire it is much less likely in the molded in coil.

BTW, I would pull the sensor and clean the face of any metal particles and then look in the hole to confirm that the signal disc is turning with the rear wheel.
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  • In my garage in Marilla, NY
  • '91K100RS White/Blue
Current:
'91 K100RS16V "Moby Brick Too"

Past:
'94 K75RT "Ilsa, She Wolf of the SS"
'92 K100RS16V "Moby Brick" (RIP, deceased in a vehicular assault)
'94 K75S Special Edition Dakar Yellow "Cheetos"
'89 K100RS Special Edition "Special Ed"

Offline Laitch

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Re: K100RS parked for four months outside in all weathers
« Reply #206 on: January 14, 2017, 01:21:03 PM »
Quote from: The Mighty Gryphon on January 14, 2017, 01:17:46 PM
With the molded in pickup coil, the problem, if it is a broken wire it is much less likely in the molded in coil.
There is a length of wire going from the pick up to the connector, right? He's already cleaned the pick up, reply #197.
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  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

Offline The Mighty Gryphon

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Re: K100RS parked for four months outside in all weathers
« Reply #207 on: January 14, 2017, 01:53:56 PM »
"There is a length of wire going from the pick up to the connector, right?"

Exactly.  My post was meant to reinforce your hypothesis that the break was most likely in the cable.  It is possible that there is a lot of metal bits in the oil, and wiping the sensor will reveal if anymore was picked up. 

The main thing is to check that the slotted ring is indeed turning to generate a speed signal.  It's unlikely that it isn't, but it's easy to check and eliminates another possible problem.
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  • In my garage in Marilla, NY
  • '91K100RS White/Blue
Current:
'91 K100RS16V "Moby Brick Too"

Past:
'94 K75RT "Ilsa, She Wolf of the SS"
'92 K100RS16V "Moby Brick" (RIP, deceased in a vehicular assault)
'94 K75S Special Edition Dakar Yellow "Cheetos"
'89 K100RS Special Edition "Special Ed"

Offline Filmcamera

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Re: K100RS parked for four months outside in all weathers
« Reply #208 on: January 14, 2017, 03:38:50 PM »
The brass ring seems to be turning just fine.  I have cleaned the end of the sensor a couple of times and it has never come away full of metal shavings etc.  I have also changed the final drive oil during the rebuild.


I am hoping very much it is the sensor, if not I might have to buy a whole instrument cluster which is going to be much more expensive.


I ordered a sensor but as always as I live way out like I do I am not going to get it for three weeks or so so until then I will just continue to ride and enjoy the bike (and hope not to get stopped by the local constabulary)  :bmwsmile :riding:
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  • San Jose, Costa Rica
  • 1991 K100RS 16v ABS1, 2022 Triumph Tiger 900 Rally Pro
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Offline The Mighty Gryphon

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Re: K100RS parked for four months outside in all weathers
« Reply #209 on: January 14, 2017, 03:42:46 PM »
Just keep an eye on your GPS.  It's way more accurate than the official speedo. 

Must be nice to have a brick in a world of bumblebees.  ENJOY!
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  • In my garage in Marilla, NY
  • '91K100RS White/Blue
Current:
'91 K100RS16V "Moby Brick Too"

Past:
'94 K75RT "Ilsa, She Wolf of the SS"
'92 K100RS16V "Moby Brick" (RIP, deceased in a vehicular assault)
'94 K75S Special Edition Dakar Yellow "Cheetos"
'89 K100RS Special Edition "Special Ed"

Offline Laitch

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Re: K100RS parked for four months outside in all weathers
« Reply #210 on: January 14, 2017, 04:07:58 PM »
Quote from: Filmcamera on January 14, 2017, 03:38:50 PM
and hope not to get stopped by the local constabulary)  :bmwsmile :riding:
If you've got a speedo app on your phone that has a large display, your phone is in a cradle that allows a fairly heads-up view and you have a pocketful of expendable paper money, that will show them that your intentions are good, and so are their prospects. It's a winning situation for everyone.

* speedo app.png (129.42 kB . 576x398 - viewed 539 times)
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  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

Offline Martin

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Re: K100RS parked for four months outside in all weathers
« Reply #211 on: January 14, 2017, 04:12:44 PM »

Bicycle speedometers can be had cheap, and if installed correctly are accurate.
Regards Martin.
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  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

Offline Martin

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Re: K100RS parked for four months outside in all weathers
« Reply #212 on: January 14, 2017, 04:24:29 PM »

http://www.k100-forum.com/t1026-rear-wheel-speed-sensor#5669
Hope it helps at least in testing the sensor, voltage output between .5 and 5.5 V AC depending on speed.
Regards Martin.
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  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

Offline The Mighty Gryphon

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Re: K100RS parked for four months outside in all weathers
« Reply #213 on: January 14, 2017, 05:58:38 PM »
Can't believe I didn't remember this earlier.

Has a function that will test your speedometer as well as make it possible to calibrate it.

http://www.k100-forum.com/t2038-karamba-speedometer-calibration-program-tutorial
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  • In my garage in Marilla, NY
  • '91K100RS White/Blue
Current:
'91 K100RS16V "Moby Brick Too"

Past:
'94 K75RT "Ilsa, She Wolf of the SS"
'92 K100RS16V "Moby Brick" (RIP, deceased in a vehicular assault)
'94 K75S Special Edition Dakar Yellow "Cheetos"
'89 K100RS Special Edition "Special Ed"

Offline Filmcamera

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Re: K100RS parked for four months outside in all weathers
« Reply #214 on: January 15, 2017, 07:26:35 AM »
That Karamba program looks great!   I am a member of the K-100 forum and the instructions just talk about going to the download section but it seems not to be there.  Does anyone have a copy of the software they could send me?
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  • San Jose, Costa Rica
  • 1991 K100RS 16v ABS1, 2022 Triumph Tiger 900 Rally Pro
Poserbricker

Offline The Mighty Gryphon

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Re: K100RS parked for four months outside in all weathers
« Reply #215 on: January 15, 2017, 08:51:02 AM »
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  • In my garage in Marilla, NY
  • '91K100RS White/Blue
Current:
'91 K100RS16V "Moby Brick Too"

Past:
'94 K75RT "Ilsa, She Wolf of the SS"
'92 K100RS16V "Moby Brick" (RIP, deceased in a vehicular assault)
'94 K75S Special Edition Dakar Yellow "Cheetos"
'89 K100RS Special Edition "Special Ed"

Offline The Mighty Gryphon

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Re: K100RS parked for four months outside in all weathers
« Reply #216 on: January 15, 2017, 09:04:44 AM »
The version at the link I posted is an earlier one that does not have an English language option.  It will work to test and calibrate the speedo on a 4V K100RS with a stock rear tire.  It is pretty intuitive, and a few minutes fooling around with it will get you up to speed. 

All you need to add is a 3.5mm stereo plug with two wires with flat blade connectors.  The instructions for the cable are in the first link I posted.
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  • In my garage in Marilla, NY
  • '91K100RS White/Blue
Current:
'91 K100RS16V "Moby Brick Too"

Past:
'94 K75RT "Ilsa, She Wolf of the SS"
'92 K100RS16V "Moby Brick" (RIP, deceased in a vehicular assault)
'94 K75S Special Edition Dakar Yellow "Cheetos"
'89 K100RS Special Edition "Special Ed"

Offline Filmcamera

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Re: K100RS parked for four months outside in all weathers
« Reply #217 on: January 15, 2017, 12:14:22 PM »
Great thanks
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  • San Jose, Costa Rica
  • 1991 K100RS 16v ABS1, 2022 Triumph Tiger 900 Rally Pro
Poserbricker

Offline Filmcamera

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Re: K100RS parked for four months outside in all weathers
« Reply #218 on: January 17, 2017, 04:08:25 PM »
I passed the road worthiness test today!  Now I am only a couple of steps away from having a number plate and being official


That is the good news, the less good news is that the bike feels pretty under powered and when I pointed a laser temperature gauge at the exhaust headers I noticed that number two was significantly cooler than the others. Not cold and I would say too warm to be simply ambient heat from the other headers.  The rest were reading about 190 C and two was reading 140 C.


I will take off the fairing this weekend and delve deeper but any suggestions of what I should look for what would be appreciated.






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  • San Jose, Costa Rica
  • 1991 K100RS 16v ABS1, 2022 Triumph Tiger 900 Rally Pro
Poserbricker

Offline Laitch

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Re: K100RS parked for four months outside in all weathers
« Reply #219 on: January 17, 2017, 04:25:21 PM »
Quote from: Filmcamera on January 17, 2017, 04:08:25 PM
I will take off the fairing this weekend and delve deeper but any suggestions of what I should look for what would be appreciated.
That cylinder might be running rich. Compare plugs. Did you ever adjust valves and balance throttle bodies?
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  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

Offline Filmcamera

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Re: K100RS parked for four months outside in all weathers
« Reply #220 on: January 17, 2017, 04:29:05 PM »
Throttle bodies yes and now I come to think of it that one was running pretty rich, the problem is the PO had clearly messed with the not to be touched throttle body screws so I was having a hard time getting things smooth and at a decent tick over, I imagine it needs more tweaking.


The valves I didn't, I watched a Chris harris video on how to do it and he says very clearly - if you have 16v K bike you are wasting your time don't bother with the valves, they never get tight.


So I took his advice and didn't, though i think I will during the rainy season just to increase my knowledge of the bike.
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  • San Jose, Costa Rica
  • 1991 K100RS 16v ABS1, 2022 Triumph Tiger 900 Rally Pro
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Offline Laitch

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Re: K100RS parked for four months outside in all weathers
« Reply #221 on: January 17, 2017, 04:49:37 PM »
Quote from: Filmcamera on January 17, 2017, 04:29:05 PM
. . . if you have 16v K bike you are wasting your time don't bother with the valves, they never get tight.
I'd usually go with what Harris is saying but your bike was in such a sorry state, I'd be compelled to check the clearances. I'm not one who goes looking for something to do either. I'd rather be riding.

Anyway, the plugs might have something to tell you and that's easy enough.
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  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

Offline Martin

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Re: K100RS parked for four months outside in all weathers
« Reply #222 on: January 17, 2017, 04:50:13 PM »

www.k100-forum.com/t1526-how-to-balance-the-throttle-bodies-solved
It is possible to rebalance the TB's.
Regards Martin.
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  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

Offline Laitch

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Re: K100RS parked for four months outside in all weathers
« Reply #223 on: January 17, 2017, 05:05:39 PM »
Quote from: Martin on January 17, 2017, 04:50:13 PM
www.k100-forum.com/t1526-how-to-balance-the-throttle-bodies-solved
It is possible to rebalance the TB's.
Regards Martin.
St. Paddy's day come early this year in OZ, Martin?
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  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

Offline bocutter Ed

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Re: K100RS parked for four months outside in all weathers
« Reply #224 on: January 17, 2017, 05:06:57 PM »
I think he spent too much time on the south side of that palm tree ...
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  • Toronto, Canada
  • '61 Puch DS60 - '66 Puch 250 SGS - '87 BMW K75s
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