Author Topic: K100 led rear light  (Read 977 times)

Offline freed

  • Curious
  • Posts: 3
K100 led rear light
« on: July 22, 2019, 03:13:33 AM »

I am building 1985 K100 caferacer and I have some dificulties with led taillight. Its some chinese assembly and has three wires.
I got it working like this: ignition switch on there is really dim light, pushing brake makes it brighter.
What wire is what in the bike? Or how should it be connected to the bike harness?
  • Finland
  • 1985 K100

Offline rbm

  • ^ Quintessential Motobricker
  • Posts: 1974
  • Regards, Robert
Toronto, Ontario

1987 K75 - Build Blog @

Offline bobvans

  • ^ Proficient Motobricker
  • Posts: 120
Re: K100 led rear light
« Reply #2 on: October 07, 2019, 04:35:40 AM »

Thank you!  Yes, in fact I got my LEDs from Drake.  Somewhere I found the jumper config to deal with the affect the BMU was having on the LED's.  It was passing enough voltage to turn on the brake lights.  This is with the BMU module removed and jumpers on the connector it would plug into.

* BMU Mod.jpg (37.91 kB . 354x400 - viewed 156 times)

The new tail light is super bright and even brighter when I hit the brakes, plus I like the strobe affect when I first hit the break.  The affect is programmable... number of flashes, brightness.

  • Vancouver, WA. USA
  • '85 K100 (Red), '96 K1100 (black), '85 K100RS (Blue, "Project Bike")