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The Motobrick Workshop / Re: 1999 K1100LT fuelling/ignition issue
« Last post by Scott_ on June 14, 2026, 11:07:06 PM »
Also, replace all the fuses, even if they seem good, they're deliberately the weakest link in the system, so deliberately easy to get to.

I had a similar issue with my K100 that sat for years before I got it. After a while the issue disappeared, I think I shook the cobwebs out of it.

Does the tail go out, or go dim when the bulb monitor light goes on?

The bulb monitor warns you if the brake circuit, or tail light circuit is faulty, the second that the problem starts. After your two hour ride, the two hours of good vibrations may have loosened the earth connection at the plug in the tail piece. This sometimes results in parallel circuits turning into series circuits, with the voltage not being good enough.
I dirty lamp socket connection can give the BMU issues.
Over the years I have read of others having issues with lamps that have a brass shell as opposed to the original nickel/polished lamp shell.
Also note that the BMU doesn't play nice with LED lamps without a load resistor(to fool the BMU).
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The Motobrick Workshop / Re: What Did You Did To Your Motobrick Today ?
« Last post by Scott_ on June 14, 2026, 10:57:05 PM »
So earlier this spring I had an unplanned 'get-off' as I got bit by the Snake(US421) in TN. I was able to right the bike and ride it out of the ditch(with some help) and back to the campground, but the damage was done.
After reviewing all my reasonable options I've decided to rebuild my '97LT(<56K miles) and put it back on the road. It has previously been damaged in a parking lot incident that left the main faring totaled, but mechanically and structurally was fine. Over the last few years I've stripped some parts off to keep my RT and other LT on the road.
Now at this point, I've previously sold the RT, and the remaining LT has totaled main fairing, damaged guards, damaged transmission, and over 126K miles. It is also showing signs of a leaking oil pump shaft seal(from the weep hole)
I picked up another LT for mainly the painted plastic parts(and everything else), this last week I got it all stripped down and broken down to basic parts, some of which  will be used on the rebuild of the '97, and what ever I have multiples of may show up for sale(yet to be determined) and damaged items to scrap.
Today I got the '95 up on the lift, ready for tear-down and inspection of parts to save/reuse on the '97.
Tomorrow I'm going to drop a battery in the '97, set a fuel tank on it and see if it fires up after setting 6yrs. I did a test today and it does turn over so that's in my favor..
Let the resurrection begin!!
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The Motobrick Workshop / Re: 1999 K1100LT fuelling/ignition issue
« Last post by daveson on June 14, 2026, 10:28:52 PM »
Also, replace all the fuses, even if they seem good, they're deliberately the weakest link in the system, so deliberately easy to get to.

I had a similar issue with my K100 that sat for years before I got it. After a while the issue disappeared, I think I shook the cobwebs out of it.


Reason Other than this, no other electrics seem to have been freaking out, other than the red warning triangle, which now won't go away when I touch both brakes, and will stay on until I bring the bike to a halt and power cycle it.

Does the tail go out, or go dim when the bulb monitor light goes on?

The bulb monitor warns you if the brake circuit, or tail light circuit is faulty, the second that the problem starts. After your two hour ride, the two hours of good vibrations may have loosened the earth connection at the plug in the tail piece. This sometimes results in parallel circuits turning into series circuits, with the voltage not being good enough.
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The Motobrick Workshop / Re: The Dreaded Under-The-Tank 4 Pin Connector (85 K100rs)
« Last post by kris on June 14, 2026, 09:53:22 PM »
You shouldn't feel old for having a very cool motorcycle!! I proudly tell anyone who will listen that Heinz is in her fortieth year! They find it hard to believe given her appearance. It is laughable that other Beemer owners didn't know your Brick was a member of the clan. Don't the badges and branding on the engine sort of give it away? But, people don't know what they don't know. Such agreeable, rideable beasts are our Ks. Revel in their exclusivity....just for shits.
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The Motobrick Workshop / Re: Wobbly Front End/ Fork Braces
« Last post by kris on June 14, 2026, 09:21:03 PM »
This is where I confess that I hadn't changed my fork oil in an unspeakable amount of time. I just changed it out with a 15 weight Belray oil. Heinz got fresh coolant today, too. The change in ride quality is remarkable!! I went to the higher end of the fill volume spec. So, for now, i will forget about fork braces and questioning the front end of this fabulous bike and remember to not wait 11 years to put in fresh oil!! (Bless me father, for I have sinned!!) Thanks for the replies and helpful suggestions.
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Welcome To Motobrick.Com / Re: New K owner in Vancouver Canada
« Last post by kris on June 14, 2026, 09:14:44 PM »
Welcome from Hamilton, Ontario. My '86 K100RT had a shade more mileage on her when purchased. The bike sat for 9 years. Ten years later the love affair continues. I stripped her down - devoid of the fairing now. Was drawn to the engine/transmission - the industrial and raw mechanical look of her. Fluids, filters, spline shaft inspection and lube and some fresh plugs and see how you like her! There are other quirks to work on but you'll find those recommendations elsewhere....like the weird little Z tube under the tank! Best of luck.
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The Motobrick Workshop / Re: Removing instrument cluster from K75C
« Last post by 3dachshunds on June 14, 2026, 08:46:15 PM »
It finally came out with a help of channel pliers, as Laitch suggested. Thanks everyone!
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The Motobrick Workshop / Re: Would this tire combination be OK?
« Last post by Laitch on June 14, 2026, 08:35:27 PM »
I believe the Shinkos may have a warning on the sidewalls—Not suitable for road attacking.
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The Motobrick Workshop / Re: Removing instrument cluster from K75C
« Last post by Edward on June 14, 2026, 08:34:57 PM »
Lift straight up will help prevent binding.
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The Motobrick Workshop / Re: 1999 K1100LT fuelling/ignition issue
« Last post by Edward on June 14, 2026, 08:32:34 PM »
Fuel pump. Replace it. They are cheap enough. Check your internal hoses are in good shape and connected.
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