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Home » Bike customization » Installing a Fender mounted LED brake light

Home » Bike customization » Installing a Fender mounted LED brake light

Installing a Fender mounted LED brake light

by Tom / Saturday, 25 May 2019 / Published in Bike customization, Electrics
fender mounted brake light tail tidy

Fender mounted LED Brake Tail light + indicator install

It’s a simple job, and there’s a million ways to do it. But how do you install a fender mounted tail light?  Well this is one way that I’ve used that incorporates a tail tidy/plate mount and a tail light all in one. A quick install process, and as a bonus I’ll show you how I fender mount a set of LED turn signals too. One of my most popular email comments is “I love your Orbit LED brake light, but how am I meant to install it?”

Sportster tail light install Custom bike Cafe Racer

So here’s your answer in the best way I can explain it, without just doing it myself. The Orbit brake lights have fast become a favourite with builders using Purpose Built Moto products. Its small, amazingly bright, easy to install and so versatile it suits any style and type of bike.


Tools you need:

  • General Hand tools
  • Hacksaw
  • Center punch
  • Electric drill
  • Grinder

Materials you need:

  • Orbit mini LED brake light
  • M6 x 20mm bolts/nuts/washers
  • 30mm x 30mm aluminium angle (only 20mm of it)

Optional

  • 1 pair PBM Turn signals
  • 16mm round stock – 50mm of
  • 20mm x 3mm flat bar- 200mm of

The bike shown here was worked on for a customer and now Mate Alex “Curly” Laird. The tail section was set to turn out really neat, so I thought what better opportunity to show you how I do it. Alex is a gun sales rep, for the Young Henry’s Brewery. These guys fuel many moto events and have been lubricating the workshop for a while now too.

Cafe Racer tail tidy brake light

To get started you need a motorcycle, and a rear fender. Got that sorted? Good.
now cut your 30×30 aluminium angle to 20-30mm long. Once cut, drill 2 x holes @6mm diameter on one side. Making sure to leave enough space between for your bolt heads.

small LED brake light motorcycle cafe racer

Dis-assemble the Purpose Built Moto Orbit Mini LED brake light. Set the lense, circlip, fixing bolt and LED unit aside. You only need the body for now.

LED brake light Mini cafe racer brat style scrambler

Laying the angle on its side, and lining the LED tail light body up to it, mark where your 10mm fixing hole needs to be drilled, and drill it out.

Installing a scrambler LED tail light

Once complete you can de-burr the holes, then mark and radius the angle bracket. I used a 26mm socket, but anything circular and the right size will do. This can be done with a handsaw and file, or a linisher if you have one.

Mini LED brake light install custom motorcycle gold coast

Once cleaned, we can start to think about the positioning of the brake light on your motorcycle rear fender. Depending on the fender angle and position, you may need to put a slight bend in the flat sections of the angle bracket. This will make sure the bracket conforms to the shape of the bike fender nicely, and the LED brake light is facing horizontally and not too far up or down.

Custom motorcycle gold coast

When you have your brake light and fender mount where you want it, mark and drill your rear fender to 6mm. If you want to go further and incorporate a tail tidy with this set up, sit the LED tail light aside. If you’re happy with this set up as it is, you can re-assemble the Orbit mini brake light, install it and fix your bracket down to the fender. Be sure to measure and trim any excess length off the M10 fixing bolt on the orbit LED brake light.

If you’re making the tail tidy/plate mount, there’s an easy way to do it. Measure from the 2 x 6mm holes to the rear of your fender and cut a length of 20 x 3mm flat bar to length.

installing LED tail light cafe racer

Next measure your plate width and cut a second piece to match that measurement. Weld these two pieces in a “T” piece as shown. Drill holes to suit your plate mount and the 6mm fender bolt holes too. You’re now ready for fit up!

Custom motorcycle tail light chopper harley davidson bobber

Once this is in place you’ll be stoked at just how clean your fender mounted LED brake light and tail tidy is. A very simple fabrication process from materials readily available from any hardware store, and only using hand tools almost anyone has in their garage.

During the process of finishing this fender with tail light I decided to Fender mount the LED turn signals. So I snapped some shots of that as well which I’ll show you here for fun.

Mounting an indicator on a round surface can be a real pain, but with a little thought and some carefully placed spacers you can achieve super clean results when mounting them up.

Using some 12mm mild steel round bar, I drilled an 8mm hole down the center. I had approx. 50mm of round bar, cut it in half and de-burred the holes.

LED turn signals fender mounted

Get the indicator situated where you want it mounted and mark the point where the LED turn signal will pass through the fender. Repeat for the otherside making sure its even. With those marks centre punch, pre-drill and finally drill a 12mm hole through the side of the fender. This will allow the spacer to go through and eventually be welded on.

I will normally mock up the LED turn signals in the spacers and place them in the fender here, just to make sure the holes are right and the lights look evenly spaced. While the lights are in-situ, I zip in 2 small tack welds. Its important to let the heat dissipate here so as to not get the LED indicator cable too hot. Take your time, and don’t melt the cables!!

Mini LED brake light cafe racer bobber shopper scrambler

Now remove the LEDs and prep to finish weld the spacers in place. When you’re finished welding you’re going to be left with a minimal looking fender set up with all the lights you need to keep the boys in blue at bay.

Cafe Racer Tail light install


I hope you’ve got some useful info out of this article, so make sure you jump on our mailing list to not miss out on any more of these helpful tech blogs or new custom builds rolling out of the shop.

Thanks for taking the time.
Tom.

Tagged under: brake light, Brat style, Cafe Racer, custom motorcycle, LED light, tail light

About Tom

My purpose throughout this endeavor has been delivering the build experience to those who otherwise may not have ever had the chance. Taking an inclusive approach with your custom motorcycle project and focusing on making you a part of the experience. In parallel to this I also pour my energy into the manufacture of high quality, detail oriented and above all easy to install components for your motorcycle project.

7 Comments to “ Installing a Fender mounted LED brake light”

  1. david yuhasz says :Reply
    January 19, 2021 at 10:53 am

    Tom
    if i need to take the 3 wire lead off your light – and i need to extend it via the fender or other – what is the wire size – type i need to connect to the harness area. Your led 3 wire – ground – running – brake – needs a 3 wire extension ?

    D

    1. Tom says :Reply
      January 20, 2021 at 1:08 pm

      Hey David

      We would use 2.5mm or 14AWG cable
      the LED indicator cable size is a lot smaller than that, but that gauge cable is more readily accessible.
      you will need to extend all 3 wires unles you ground the Black cable locally on the fender.
      Tom

  2. Thilo says :Reply
    March 8, 2021 at 7:06 am

    Hey Tom! For wiring this beauty: Black = Ground / Red = ? / Yellow = ? Thanks!

    1. Tom says :Reply
      March 8, 2021 at 7:42 am

      The red and yellow can be used however you like on your bike.
      Yellow is the Halo, red is the center.

      1. Thilo says :Reply
        March 8, 2021 at 6:34 pm

        Thanks 🙂

  3. Mike says :Reply
    May 20, 2022 at 5:42 pm

    Hey there, quick question: can you use the led tail light as a plate light as well? Or is the only option to buy one separately. My plate will sit under the tailight, so I’d prefer a clean look of the single multi-purpose tail light rather than having to use another. Cheers

    1. Tom says :Reply
      May 23, 2022 at 3:20 pm

      This tail light doesnt have a plate light included.
      You can grab our Plate Lights here: https://purposebuiltmoto.com/product/motorcycle-plate-light/

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