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The Motobrick Workshop / Re: 1990 K75s questions
« Last post by K1300S on August 03, 2020, 10:27:43 PM »
nice find!  yup...change ALL the fluids and the tires.  EBC brake pads are winners.  i would also start changing all the rubber hoses (brake/gas/coolant). rubber is not forever and does not care about low miles.  the hoses are probably 30 year old originals...past due.
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The Motobrick Workshop / Re: 1990 K75s questions
« Last post by Smithrjd on August 03, 2020, 09:37:55 PM »
Yes, that was my thought as well. I have had two other K75's and the instruments were always suspect. Looking very close at the bike no corrosion on any of the fasteners or clamps. Full service history from a know BMW shop. I am the third owner. I feel it is legit.
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The Motobrick Workshop / Re: 1990 K75s questions
« Last post by Chaos on August 03, 2020, 09:26:15 PM »
looks like a pristine example!  If the odo is correct splines should be good but due after 30 years.  I wouldn't sweat the type of spline lube too much, doing it regularly is more critical that what you use.  Honda 77 should be fine.  The reset knob dropping off make me think the speedo pod might have been apart and mileage suspect.
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Project Custom Motobricks / Re: 1993 BMW K1100LT Cafe Racer Motoscope Pro Tach Project
« Last post by rbm on August 03, 2020, 08:00:30 PM »
Quote from: carrotbay on August 03, 2020, 04:21:35 PM
mjones866 .. did you ever solve this issue? I have the same when trying to use a BEP3.0 with a Motoscope Pro .. no output, although when I connect a meter to the BEP output there is one.
If you are using the cheap Chinese gauge that is popular to retorfit, it requires a negative going signal on the tach input to work.  It's a simple fix.  Put a series ceramic capacitor of 0.22uF between the output of the BEP and the gauge tach input.  Then connect a 2.9KOhm 5% 1/4Watt resistor between the gauge tach input and ground.  Here's a link to a picture of one that someone else built using my instructions.
http://www.motobrick.com/index.php/topic,11148.msg97089.html#msg97089
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The Motobrick Workshop / Re: 1990 K75s questions
« Last post by Martin on August 03, 2020, 07:59:26 PM »
 :welcome From the Oz point of view the pictures are fine.
Regards Martin.
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Project Classic Motobricks / 22Lt top box mounting plate.
« Last post by Martin on August 03, 2020, 07:56:32 PM »
Due to the 22Lt top box mounting plates seeming to disappear I thought I'd look into whether it would be possible to make them. The guys in the foundry decided to fit it with reinforcing. This has now deemed to be unnecessary as pushing the pattern a little deeper into the mold is all that is needed. The steel cam lock was initially made in two pieces and silver soldered together. This was found to be time consuming and future ones will be cast in brass using a pattern.
Regards Martin.

* 22Lt mounting plate 1.png (43.6 kB . 768x576 - viewed 13 times)
* 22Lt mounting plate 2.png (32.72 kB . 768x576 - viewed 13 times)
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The Motobrick Workshop / Re: Boiling Fuel Solution New Mk2 Improved Version
« Last post by Martin on August 03, 2020, 07:26:14 PM »
I've running the Mk1 version for 2 years and never had a return of stalling in traffic on hot days problem. The Mk1 version did all that I had hoped for and then some, as well as stopping the stalling in traffic on hot days it also greatly reduced the tank temperature. However there were access problems for tuning, so hence the MK2 version. The Mk1 version was made out of .6mm aluminium the Mk2 version was 1.5mm. The Mk2 version was made in two pieces to allow access for tuning and was a lot tighter fit around the rail injector cups.

I'm hoping that the thicker aluminium and tighter fit of the shield and the insulation will hopefully reduce the rail temperature even a little more. The two part design will allow for more easy changes in height, thickness and allow a paint to unpainted version of the top part of the shield to be compared. Comparisons between my bikes tank and rail temperatures to mates bikes have shown a large reduction. In a week a few of us are undertaking a four day ride and I'll try and take comparative readings. Initial readings at this stage are looking comparable between the MK1 and Mk2 but I wont really know until we hit summer.
Regards Martin.

* Mk2 heat shield 1.png (46.18 kB . 768x576 - viewed 17 times)
* Mk2 heat shield 2.png (50.11 kB . 768x576 - viewed 17 times)
* Mk2 heat shield 3.png (52.99 kB . 768x576 - viewed 17 times)
* Mk2 heat shield 4.png (55.12 kB . 768x576 - viewed 17 times)
* Mk2 heat shield 5.png (32.83 kB . 768x576 - viewed 17 times)
* Mk2 heat shield 6.png (39.37 kB . 768x576 - viewed 17 times)
* Mk2 heat shield 7.png (36.45 kB . 768x576 - viewed 17 times)
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The MBdotCOM Community Center / Re: K75 S Handlebars...On an R65
« Last post by Chaos on August 03, 2020, 06:39:54 PM »
Nice swap, I had an LS with the low bars, don't remember them as being uncomfortable but that was 35 years ago!
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The Motobrick Workshop / Re: 1990 K75s questions
« Last post by Smithrjd on August 03, 2020, 06:30:52 PM »
Obviously I need to work on my pictures... It wasn't upside down before..
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The Motobrick Workshop / 1990 K75s questions
« Last post by Smithrjd on August 03, 2020, 06:29:10 PM »
Long time lurker, and a long time BMW owner. (R90s, K100RT, R1150RT, K75T, K75C, 1200RS) Getting older and decided I would sell the 1200RS before I drop it getting it on the center stand... Took awhile, but I found a pristine '90 K75s with 12K miles. Full service history to 11500, now has 12250. All fluids were done at the last service, engine oil, gearbox, rear drive, brakes flushed and coolant flushed. Trouble is that was 4 1/2 years ago. Little use since 2015. I suppose I should just "run the rack" planning on a spline lube as well. (no clear evidence it has ever been done) What do folks use now days for spline lube? Honda 60 is no more and Honda 77 perhaps is not the same thing. I can find Staburags, and some Moly assembly lubes. Brake pads are a bit worn so will replace them as well. EBC HH seems to be a good choice, or just go with OEM pads? Tires are 6 years old so they will go as well. (replaced at 11500) One problem on the ride home. The trip reset knob went AWOL, was there when I left after purchasing the bike but was gone when I got
* 20200801_091610.jpg (60.41 kB . 768x432 - viewed 17 times)home 75 miles later. Of course, they are N/A from BMW. Anyone have a busted speedo with a knob they would part with? 

* 20200801_091610.jpg (60.41 kB . 768x432 - viewed 17 times)
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