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Welcome! 

To answer your questions, I do my repairs with fiberglass and polyester resin.

The parts fiche at MaxBMW will show you all the parts for your bike, as well as their approximate location. 

https://shop.maxbmw.com/fiche/DiagramsMain.aspx?vid=51743&rnd=07242017

Crash bars are pretty much a waste of time and money on the brick.  The factory bars are designed to break away, doing extra damage to the lower fairing.  The problem is that they are bolted to the bottom of the oil pan which is an aluminum casting and doesn't have much strength.  If they were attached firmly to it, you would dump all the oil every time the bike is dropped. 

The RT is essentially a long distance pavement cruiser.  If you want to run with the adventure guys, I would suggest removing the lower fairing panels and the mirror pods.  You can mount mirrors on the handlebars easily as there are mounting holes in the switch housings.

You might be able to fabricate crash bars, but it will be difficult to attach them as there are no engine mounts below the cylinder head. There is a thread here somewhere of a bike that was built to go around the world.  The builder had created some crash bars that looked like they would work, but as I recall they were somewhat bulky.
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Welcome To Motobrick.Com / New to Brick-world in Round Hill, Alberta, Canada
« Last post by jiggseob on March 27, 2024, 12:01:09 AM »
Just picked up a new-to-me 1992 K75 RT. 97k kilometers (60k miles) on odometer.  Missing some stuff, right side cover, left side  fairing compartment cover.

PO looks like they dropped low speed on right side, so radiator surround and fairing lower are scuffed and need some love or replacement.  I'm not big on having a "pristine" looking bike, but I do like things that are reliable. 

The bottom tail of the right side of the fairing lower is not bolted on to anything.  The left side is bracketed to the engine.  I'd like to have a photo of that right side bracket, and where it bolts onto the engine.  If someone has an RT, could you please snap and post a picture of how the right-side fairing lower is bracketed and supported.

Theres a crack in the upper fairing right under the windshield.  Something I would "repair".  Whats the best repair method?  Wire mesh and JB weld metal epoxy?  Fiberglas cloth and some resin?  Martha Stewarts glue gun?  Advice appreciated.

I am a somewhat klutzy motorcyclist, in that I ride in adventurous places like dirt/gravel roads, and tilted places.  Not being on flat, level, hard pavement all the time, I occasionally "drop" my bike on its side.  This RT model looks like broken stuff every time I drop it.  My Kawasaki KLR 650 is like that, an expensive aluminum radiator on the right side.  For my KLR, I fabricated guard bars to protect engine and plastics when (not if) I drop it.  I'd like to buy or fabricate guard bars for my K75 RT.  Does anyone have guard bars on an RT that can snap a couple photos of how they are shaped and how they bolt-on.

Can't wait for the glaciers to recede and riding weather to happen in Alberta Canada....



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Project Custom Motobricks / Re: No spark no fuel
« Last post by Jan on March 26, 2024, 07:46:08 PM »
Hey sorry the Densit would be the air temperature sensor I named it wrong, the ignition output unit I checked and made sure it had a good contact but I will try adding the paste, and I did notice my hall sensor was kinda rusted I ordered one already waiting for it to arrive.
Thank you,  I will keep you updated 🙏
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Project Custom Motobricks / Re: Tenet Magic Box vs. Motogadget M-Unit
« Last post by LethalJD on March 26, 2024, 02:47:36 PM »
Replying to myself in case this is helpful for others. Here is what I have learned...

Tenet Magic Box - used to allow the easy connection of an aftermarket speedo to the factory wiring harness. Unlike the Motogadget M Unit, this does NOT replace the guts of the bike (relays, fuses, etc under the seat). This just allows you to plug the existing wiring harness in to the Tenet Box, then hook up the Tenet box to the new speedo. From my research the Magic Box and the BEP 3.0 offer similar capabilities.

Motogadget M Unit - used to replace most parts of the guts of the bike (lunch box under the seat). You can hook up aftermarket speedos to this as well, without the Tenet.

Can you use them together? Yes, I suppose you could, but I'm not sure it would add much value. If you are already doing the work to hook up the M Unit you'll have everything apart and should be able to wire up the aftermarket speedo from there, although you'll have to cut the wires and hook things up terminal by terminal.
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Repair Guidance ~ Off-Site / MOVED: K75 24 point pin connection
« Last post by Laitch on March 26, 2024, 11:17:01 AM »
This topic has been moved to the Motobrick Workshop.

https://www.motobrick.com/index.php?topic=15536.0
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The Motobrick Workshop / Re: 16V Air Temperature Sensor Test
« Last post by Laitch on March 25, 2024, 08:12:15 PM »
Here is data derived from BMW's proprietary electronic system tester but a good multimeter also could be used to determine the resistance. The Motronic test manual from which this data comes is downloadable from the link supplied by volador on this page.
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Project Custom Motobricks / Re: No spark no fuel
« Last post by Laitch on March 25, 2024, 07:45:54 PM »
What "the Densit", Jan—heat sink paste on the ignition output contacts?

Among other sources, interruption of the Hall sensor signal would definitely interfere with injection and spark, but so would having a dirty ignition output unit. Your "93 should have one of those. It's attached to the battery cradle. If its mating surfaces haven't been cleaned then smoothed with heat sink paste and its plug not clean, that could contribute to your difficulty.
From BMW's K1100 manual downloadable from a link at this page.


The Motronic 2.1/2.2 manual is downloadable from a link at this page.
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The Motobrick Workshop / Re: thermostat on the bricks - word of caution
« Last post by stokester on March 25, 2024, 07:13:59 PM »
Thanks for sharing.
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The Motobrick Workshop / Re: thermostat on the bricks - word of caution
« Last post by The Mighty Gryphon on March 25, 2024, 10:13:31 AM »
Good information.  It is important to get the thermostat installed properly because one of it's functions is to close off the radiator bypass. 
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The Motobrick Workshop / Re: thermostat on the bricks - word of caution
« Last post by Laitch on March 25, 2024, 07:40:28 AM »
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