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31
The Motobrick Workshop / Re: Front Suspension Noise k75s
« Last post by Laitch on November 01, 2026, 04:27:06 PM »
Starting there would help narrow the investigation. Is your Brick equipped with a Sport fork or a Showa? The amount of fluid depends on the fork. Yours should be a Showa but a lot of parts
swapping happens to Bricks.

Showa—note the solid face slider axle mount area indicated by the arrow.

410cc for a simple oil change. Use automatic transmission fluid or 10W fork oil.

Sport—note the bladed axle mount area.

280cc ATM fluid or10W fork oil.

Follow fluid replacement instructions in the BMW workshop manual downloadable from this site—pages 00-42 to 0043. Take the Brick for a ride to heat up the fluid then change it according to instructions. A full oil replacement can get more complicated. This method should be enough to help diagnosis. The drain screws for this operation are located on the rear side of the slider. Be sure to soak them in penetrating oil like Liquid Wrench, tap them lightly with a hammer, and wail 15minutes before loosening. Those screws can seize; they should come off easily sometimes accompanied by a cracking noise. Don't try to loosen them with a dying strain; that can be followed by rounding the wrench seat or snapping the screw. If they're stubborn, heat the screw, apply the penetrating oil, wait and try later.



32
The Motobrick Workshop / Re: K75 Temp Light Always On
« Last post by Steveboot on November 01, 2026, 03:49:31 PM »
Had a few spare minutes today so thought I'd just pull the thermostat, check the o-ring, reinstall the thermostat making sure it was fully seated. and put the the cover back on torquing the bolts to the specified 3 NM.

Pulling the thermostat drained 500ml, which surprised me a little (I thought the vacuum might make that amount lower, but I guess the angles involve allowed some air to enter as the coolant was leaving). But I fired the bike up anyway without replacing the lost coolant since this was just a test.

Again, I let the bike come up to running temperature and this time there was just a hint of a drip forming at the thermostat cover, however, the fan didn't come on and the temperature light did.

I turned the bike off and let that result ruminate for a bit.

I just came back from testing the fan from the fan relay and it runs just fine (both with 12v applied to the A2 terminal and with A2 jumpered to the 15 terminal with the ignition switch on. So I am back to square one.
 
33
The Motobrick Workshop / Re: Front Suspension Noise k75s
« Last post by Kchop on November 01, 2026, 02:59:37 PM »
That is correct, sir... I'm guessing you are suggesting to start there??
34
The Motobrick Workshop / Re: Front Suspension Noise k75s
« Last post by Laitch on November 01, 2026, 01:39:11 PM »
From reading your posts, it doesn't seem like you've drained and replaced the fork fluid. Accurate?
35
The Motobrick Workshop / Re: Front Suspension Noise k75s
« Last post by Kchop on November 01, 2026, 09:23:18 AM »
lol, thanks for your reply.   testing that out today.. wondering if that's a safety problem riding like that??

btw.. is that chopper???
36
The Motobrick Workshop / Re: K75T windscreen bracket pics on bike
« Last post by Laitch on October 31, 2026, 07:15:40 PM »
My Brick had a National Plexistar windscreen when I bought it 13 or so years ago. It gave good wind and rain protection. I could also look over the top of it when necessary. The mounting system is the same as on the OEM touring shield of the K75—rods bracing the upper section were attached to the handlebar. A clamp on each side of the lower section secured it to the fork tubes. It worked well with no rattling or loosening.

5000 miles into the ownership of my Brick, I discovered I liked riding with no screen rain or shine—and lower bars, too—so I removed the National, sold off the Corbin seat and backrest then replaced the Corbin with an OEM bench seat that had custom padding. I still have the National with mounts attached stored in my shed.




37
The Motobrick Workshop / Re: K75T windscreen bracket pics on bike
« Last post by Mayne on October 31, 2026, 01:30:26 PM »
That gives me a general idea. I found some brackets in Lithuania, but they don't ship to the USA. I don't blame them at this point either. I may see if I can fabricate something close enough to work.
Thanks
Kelley
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The Motobrick Workshop / Re: K75T windscreen bracket pics on bike
« Last post by John Lang on October 31, 2026, 11:07:35 AM »
Here's a somewhat unclear fiche shot from Max BMW.

https://shop.maxbmw.com/fiche/DiagramsMain.aspx?vid=51741&rnd=07242017
39
The Motobrick Workshop / K75T windscreen bracket pics on bike
« Last post by Mayne on October 30, 2026, 10:35:26 PM »
Looking tor some pictures of the tall windscreen brackets and how they mount to the bike.
Thank you for your time
Kelley
40
The Motobrick Workshop / Re: K75 Temp Light Always On
« Last post by Laitch on October 30, 2026, 04:50:09 PM »
It's clear the cap bolts have been over-torqued. The torque spec for the cap-to-housing bolts is 3.0±0.45Nm.

Part of the installation problem also could involve O-ring rubber type and sometimes, the finesse involved when inserting the thermostat. Here is a relevant post with one rider's experience. These and many other torque specs for the 2V Bricks are found in the abridged BMW K75/K100 shop manual downloadable from the Technical Directory here.

The relevant temperature activation numbers can also be found there, and the ones relevant to this thread are below.
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