Author Topic: Custom LED Brake Light  (Read 6929 times)

Offline bobvans

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  • Posts: 154
Custom LED Brake Light
« on: March 02, 2021, 11:31:32 PM »
Back when I got my '86 K100 I wanted to improve safety a bit by adding an LED brake light that strobes when brake is applied.  It was a bit of a hack job in that I bought one of the standard tail lights Custom LED offered and cut up my tail light to make it fit.


* IMG_1002.JPG (43.87 kB . 432x576 - viewed 976 times)

Now that I have a'96 K1100, I wanted to add the same capability but make it look stock and have it light up the entire tail light like this picture someone posted somewhere...


* Tailight.JPG (50.41 kB . 768x576 - viewed 875 times)

But I want it to strobe like this... except I won't use the turn signal feature since I want to continue using the original turn signals.



So I bought a new tail light from Max BMW, cut it open with a dremel and sawzall.


* File_000.jpeg (62.03 kB . 768x576 - viewed 832 times)

And am now working with Custom LED to have a... you guessed it, custom LED board made up to hopefully somehow fit into the tail light.  Here's the board design we settled on...


* Custom LED R3.jpg (28.2 kB . 768x396 - viewed 855 times)
  • Vancouver, WA. USA
  • '85 K100 (Red), '96 K1100RS (Graphite), '85 K100RS (Blue, "Project Bike")

Offline AtLarge

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  • Not too many bikes. Garage too small.
Re: Custom LED Brake Light
« Reply #1 on: March 03, 2021, 06:35:35 AM »
 :popcorm
  • IA
  • 1994 K1100RS
1973 Honda CL70-K3, 1975 Kawasaki 350 F9-C, 1994 BMW K1100RS, 2023 Honda CRF300L Rally ABS

Offline K1300S

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Project Thread "K75s Midlife Refresh"
http://www.motobrick.com/index.php/topic,7810.0.html

Offline bobvans

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Re: Custom LED Brake Light
« Reply #3 on: March 03, 2021, 12:23:48 PM »
https://www.skenelights.com/online-store/P3-Lights-p199537706

I've seen those but really want the entire tail light to strobe and be super bright.  Hopefully I sized the board correctly and can get it all back together and look decent :laughing4-giggles:.  I'll provide an update in a few weeks when I get the board.
  • Vancouver, WA. USA
  • '85 K100 (Red), '96 K1100RS (Graphite), '85 K100RS (Blue, "Project Bike")

Offline rbm

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Re: Custom LED Brake Light
« Reply #4 on: March 03, 2021, 01:56:35 PM »
Will your board act as running lights as well as a strobing brake light?
  • Regards, Robert
Toronto, Ontario

1987 K75 - Build Blog @http://k75retro.blogspot.ca/

Offline bobvans

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Re: Custom LED Brake Light
« Reply #5 on: March 03, 2021, 07:02:32 PM »
Will your board act as running lights as well as a strobing brake light?

Yes, running lights, brake lights, and integrated turn signals (if you want).  The strobe affect on braking is selectable... 11 different options. 


* Strobe pattern.jpg (71.48 kB . 768x446 - viewed 791 times)
  • Vancouver, WA. USA
  • '85 K100 (Red), '96 K1100RS (Graphite), '85 K100RS (Blue, "Project Bike")

Offline Laitch

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Re: Custom LED Brake Light
« Reply #6 on: March 04, 2021, 11:02:43 AM »
11 options! God bless America—or elsewhere—whichever is applicable!
  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles
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Offline bobvans

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Re: Custom LED Brake Light
« Reply #7 on: March 04, 2021, 12:01:56 PM »
11 options! God bless America—or elsewhere—whichever is applicable!

Ha ha... can't have too many options  :laughing1:.
  • Vancouver, WA. USA
  • '85 K100 (Red), '96 K1100RS (Graphite), '85 K100RS (Blue, "Project Bike")

Offline Past-my-Prime

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  • All of us are better when we're loved.
Re: Custom LED Brake Light
« Reply #8 on: March 04, 2021, 08:54:59 PM »
Can I have three quick flashes, then three slow flashes, then three quick flashes, repeat?
  • North Shore of Lake Superior (in my garage)
  • BRICK: 1989 K75 RT - Rocinante; NON-BRICK: 2007 F650 GS Dakar - Betty Blue

Offline bobvans

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Re: Custom LED Brake Light
« Reply #9 on: March 04, 2021, 10:27:13 PM »
Can I have three quick flashes, then three slow flashes, then three quick flashes, repeat?

That would be with the 4 way flashers option  :laughing1:
  • Vancouver, WA. USA
  • '85 K100 (Red), '96 K1100RS (Graphite), '85 K100RS (Blue, "Project Bike")

Offline The Mighty Gryphon

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Re: Custom LED Brake Light
« Reply #10 on: March 05, 2021, 12:05:24 AM »
Despite the term SOS, I believe the correct pattern is 3 quick, 3 slow, 3 quick, 3 slow, etc.
  • 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 bobvans

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Re: Custom LED Brake Light
« Reply #11 on: March 24, 2021, 07:50:35 PM »
Received the custom LED board on Monday.  Now the challenge will be to cut away the right amount of the tail light's plastic support structure to fit the board while maintaining enough structural strength of the overall assembly.  I think a band saw would make the task a lot easier.  May need to take this to work and see if I can get into the model shop.


* LED Board.jpeg (67.86 kB . 768x576 - viewed 747 times)
  • Vancouver, WA. USA
  • '85 K100 (Red), '96 K1100RS (Graphite), '85 K100RS (Blue, "Project Bike")

Offline bobvans

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Re: Custom LED Brake Light
« Reply #12 on: March 24, 2021, 08:10:26 PM »

* LED Board 01.jpeg (56.59 kB . 768x576 - viewed 763 times)


* LED Board 02.jpeg (58 kB . 768x576 - viewed 753 times)

I want to get it mounted in this location so need to cut away the part of the housing that's in the way.


* LED Board 03.jpeg (35.95 kB . 768x576 - viewed 760 times)
  • Vancouver, WA. USA
  • '85 K100 (Red), '96 K1100RS (Graphite), '85 K100RS (Blue, "Project Bike")

Offline bobvans

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Re: Custom LED Brake Light
« Reply #13 on: March 25, 2021, 04:53:22 PM »
Started cutting away on the tail light assembly.  A ways to go yet but this gives me a feel for how it will turn out.  Looks like the structure should be in good shape, even after the hacking is done.


* Housing Mod 02.jpeg (55.79 kB . 768x576 - viewed 745 times)


* Housing Mod 01.jpeg (41.16 kB . 768x576 - viewed 743 times)
  • Vancouver, WA. USA
  • '85 K100 (Red), '96 K1100RS (Graphite), '85 K100RS (Blue, "Project Bike")

Offline Laitch

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Re: Custom LED Brake Light
« Reply #14 on: March 25, 2021, 11:49:13 PM »
How many of those lights serve as brake lights, how many serve as tail lights and how are they arrayed, or do they all have a double function?
  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

Offline bobvans

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Re: Custom LED Brake Light
« Reply #15 on: March 26, 2021, 07:32:01 PM »
How many of those lights serve as brake lights, how many serve as tail lights and how are they arrayed, or do they all have a double function?

I haven't confirmed yet, but they're all supposed to be double function (running and brake lights).  For turn signals half would flash on and off.

I'm chomping on the bit to due an A/B compare... so may do that before I get the actual retrofit done.  On that note, I'm going Dremel vs band saw and my Dremel crapped out on me... may need new brushes :idunno:.
  • Vancouver, WA. USA
  • '85 K100 (Red), '96 K1100RS (Graphite), '85 K100RS (Blue, "Project Bike")

Offline Rcgreaves

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  • "I'd rather be flying, but this will do nicely"
Re: Custom LED Brake Light
« Reply #16 on: March 27, 2021, 12:15:51 AM »
 :popcorm "Cuuuul".....
  • Livingston in Southwest WI. USA-"With the good earth all around."
  • 94' K75S, 85' GL1200 Aspencade, 96' VFR750F, 01' GL1800. Restoring: 95' K1100RS, 83' R80RT NEW: Motorvation Formula II
Doing “better than I deserve"

Offline bobvans

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Re: Custom LED Brake Light
« Reply #17 on: April 02, 2021, 12:52:45 AM »
Got my Dremel back online so did some more cutting.  It's almost there... just a little more trimming to level out the surface the board will lay against.


* Custom LED 30.jpeg (63.45 kB . 768x576 - viewed 733 times)


* Custom LED 31.jpeg (33.64 kB . 768x576 - viewed 687 times)


* LED Board 12.jpeg (54.19 kB . 768x576 - viewed 707 times)


* LED Board 10.jpeg (38.11 kB . 768x576 - viewed 738 times)
  • Vancouver, WA. USA
  • '85 K100 (Red), '96 K1100RS (Graphite), '85 K100RS (Blue, "Project Bike")

Offline bobvans

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Re: Custom LED Brake Light
« Reply #18 on: April 05, 2021, 04:37:52 PM »
After a bit more trimming with the Dremel, I've got it to where I think it needs to be.  Decided to close off all the openings with some pieces I cut from electrical boxes.  Hot glued them in place.


* Housing Mod 07.jpeg (27.19 kB . 768x576 - viewed 685 times)


* Housing Mod 05.jpeg (49.83 kB . 768x576 - viewed 692 times)

Next I need to drill a couple of holes for a couple of mounting screws along with adding something for the screws to screw into.  I'm going to try using the two drilled screw bosses from the electrical box.
  • Vancouver, WA. USA
  • '85 K100 (Red), '96 K1100RS (Graphite), '85 K100RS (Blue, "Project Bike")

Offline bobvans

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Re: Custom LED Brake Light
« Reply #19 on: April 05, 2021, 10:51:38 PM »
I wasn't sure about what to do with the brake light "magnifier" part of the tail light.  Then remembered that the entire tail light will be the brake light so decided to just cut it off and leave only the clear lens part for license plate illumination.  I glued it with a combination of super glue and hot glue... super hot glue  :laughing1:.  Actually just super glued it on and put the hot melt over the joint for good measure.


* Magnifier 01.jpeg (82.79 kB . 768x576 - viewed 679 times)


* Magnifier 03.jpeg (82.92 kB . 768x576 - viewed 700 times)


* Magnifier 02.jpeg (59.21 kB . 768x576 - viewed 673 times)

Just to add... I had to trim the inner walls of the red lens to allow the lens to fit over the circuit board.
  • Vancouver, WA. USA
  • '85 K100 (Red), '96 K1100RS (Graphite), '85 K100RS (Blue, "Project Bike")

Offline The Mighty Gryphon

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Re: Custom LED Brake Light
« Reply #20 on: April 05, 2021, 11:45:10 PM »
Looks interesting.  Keep posting.
  • 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 bobvans

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Re: Custom LED Brake Light
« Reply #21 on: April 06, 2021, 03:10:12 PM »
Looks like using the screw bosses off the electrical switch box is going to work nicely.  My plan is to attach the board using the bosses as nuts.  Get the board in final position and then mark location of the bosses.  I'll epoxy them in place, mount the board to hold them in place.  Then I'll add some epoxy between the boss and adjacent wall for good measure...


* Screw Boss.jpeg (48.16 kB . 768x576 - viewed 691 times)


* Screw Boss 01.jpeg (23.4 kB . 768x576 - viewed 666 times)


* Screw Boss 03.jpeg (25.11 kB . 768x576 - viewed 675 times)


* Screw Boss 02.jpeg (44.76 kB . 768x576 - viewed 686 times)
  • Vancouver, WA. USA
  • '85 K100 (Red), '96 K1100RS (Graphite), '85 K100RS (Blue, "Project Bike")

Offline stokester

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Re: Custom LED Brake Light
« Reply #22 on: April 06, 2021, 08:57:23 PM »
I like it!  Keep us updated on your progress.
During some recent airhead work for a friend I installed a commercial LED taillight replacement which really lit up the running and brake illumination but I was a bit disappointed that there were no flashing options.
  • Yorktown Virginia
  • '94 K75S Dakar Yellow - '93 K75S Seiden Blau - '91 R100RT Bermuda Blue- '78 R100S Smoke Red

Offline bobvans

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Re: Custom LED Brake Light
« Reply #23 on: April 07, 2021, 11:54:11 AM »
I like it!  Keep us updated on your progress.
During some recent airhead work for a friend I installed a commercial LED taillight replacement which really lit up the running and brake illumination but I was a bit disappointed that there were no flashing options.

I know what you mean.  I really liked having that strobe on my K100 to give extra visibility when at a stop light.  If I was off the brake but see a car coming up from behind I'd squeeze the brake lever a time or two to make sure they're slowing down. Seems it would maybe catch someone's attention if their texting.  There was someone that got killed at an off ramp last year not too far from my house.  Driver was under the influence and didn't see the vehicles stopped at the light, I guess.  Motorcyclist got caught between her and the pickup truck in front of him.  Not sure a strobe would have made a difference in that case though.
  • Vancouver, WA. USA
  • '85 K100 (Red), '96 K1100RS (Graphite), '85 K100RS (Blue, "Project Bike")

Offline Laitch

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Re: Custom LED Brake Light
« Reply #24 on: April 07, 2021, 12:00:31 PM »
Not sure a strobe would have made a difference in that case though.
Drivers regularly crash into lit up police cars parked on shoulders. In attempts to avert that, intermittently flashing, rather than pulsating, strobes have been developed. There's a body of evidence that suggests pulsating strobes can attract some drivers rather than alert them. It's a jungle out there.  :laughing4-giggles:
  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

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