Universal Round LED Cluster

16   |  

Custom LED

$34.99 $39.99

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4-Wire Conversion Pack for Universal Round LED Clusters | Custom LED

4-Wire Conversion Pack

Allows for Run (dim red), Brake (bright red) and Turn (bright yellow) operation of our Universal Round Clusters with Red Primary/ Yellow Secondary option. Only intended for use with our 1.85"...
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  • 1.85" diameter Universal LED Cluster with ColorChange for Run and Turn operation, or Run and Brake operation.
  • Fits stock Harley-Davidson blinker housings with simple retrofit!
  • Fits many hot-bodies undertail led cluster housings. See DIY write-up here.
  • Replaces common MR-16 type aftermarket lamp housings (same diameter).
  • Note: requires adequate weatherproofing, enclosure not included.
  • Can be configured for running light, brake light and blinker operation! (4-wire conversion pack required).
  • Sold as EACH.
  • Made in the USA.
  • Ships within 1 business day.


The Custom LED 1.85" Universal Round LED Clusters feature 18 ultra bright running light LEDs in your color of choice, and 16 ultra bright turn/brake LEDs in either red or yellow.  The LEDs and ColorChange Technology is tightly packed on the PCB for the tightest power density possible.  The total thickness from the top of the LEDs to the bottom of the circuit board is only ~0.45".  These LED clusters are amazingly bright!

With a simple three-wire configuration, the clusters have a Run input (primary LEDs on), a Turn or Brake input (secondary LEDs on), and a common ground.  The on-board ColorChange technology will automatically shut-off the Primary LEDs anytime that the Secondary LEDs come on.  This way there is no color-mixing, and the turn or brake indication is a pure color and distinguishable.

Example: a White primary/Yellow secondary setup would be bright white for running light, and would alternate between white and yellow when a turn signal is on.

For Run, Brake AND Turn function, add our 4-wire Conversion Packs, and now you have Run (dim primary), Brake (bright primary), and Turns (bright secondary).  You would want to choose the RED PRIMARY/YELLOW SECONDARY configuration for this setup.


We have a large collection of all Custom LED product videos on the Custom LED YouTube Channel.

The videos in this playlist below are a collection of user-submitted and original videos related to our 1.85" Round Clusters.


The Custom LED 1.85" Round Clusters come as shown in the pictures.  There is no mounting hardware or enclosures provided.  Mounting can be achieved simply with hot-glue, or double sided tape.  Care must be taken to prevent shorting the exposed solder points on the back of the PCB.  The Clusters are not waterproof, so they must be enclosed in a suitable enclosure.  As mentioned above, the 1.85" dimension is similar to that of an MR16 lamp which is commonly used in aftermarket turn signal housings.

Wiring the Round Clusters is as simple as any 3-wire setup:

  • Red wire: Run +12V (illuminates the Primary LEDs)
  • White wire: Turn or Brake +12V (illuminates the Secondary LEDs, and shuts off the Primary LEDs)
  • Black wire: Ground

As with any LED blinker modifications, additional accessories may be required to maintain the normal blink rate after removing incandescent blinkers, and installing LED blinkers.  The correct solutions to these issues are covered in our Frequent Questions section of our website.

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Customer Reviews

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  • hotbodies kit
  • lights
  • hotbodies
  • shipping
  • guys
  • housing
  • brightness
  • cars
  • conversion
  • turning signal
James F.
United States

1.85" round LED cluster

Brightness is amazing and makes a world of difference on my GSXR 750. Great LED!!!!

Eric M.
United States

Good investment for safe style

Definitely brightened up the undertail on my RC51. Guys I ride with complained they couldn't see what I was doing (braking/turning) prior to the conversion. Now, things are nice and bright back there and I feel much safer, especially when riding alone and trusting cars behind me to react to what I signal. I highly recommend these lights! Was a fairly simple conversion for the Mototeck undertail on an '02 RC51. Thanks Custom LED!

Marcos m.
United States

Quick and good quality

Very quick shipping

Daniel C.
United States

Brighter, safer brake lights

Bought these for my RC51 SP2 with the hotbodies undertail. Install was easy just had to pop out the lens from the hotbodies kit using a heat gun, then I used a dremel to cut out the lights from the lens and then I used a silicone sealant to glue in the custom led lights into the housing. Overall it was pretty easy to do and the results are incredible. Very happy I went with custom LED.

Daniel C. verified customer review of Universal Round LED Cluster
Chris V.
United States

Lights, relay, wires...oh my!

I bought the lights, 3-4 wire adapter and flasher relay for my newly acquired Honda Rc51. I can’t begin to tell you how bright these lights are. The wiring instructions were spot on as well. I opted to solder and heat shrink my lights into the harness versus the crimp connectors, but I am sure they would work fine. I really don’t have any issues with the product, the instructions, or the quality. Couldn’t ask for anything more. I’d recommend this product to anybody looking for an upgrade to their undertail assembly. I’m very happy with the outcome!

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