How to install a taillight on the ETM RTR — no splicing, no screaming at wires
Stock, the ETM RTR gives you no taillight, no turn signals, and definitely no clean way to add any of it. The Ampirra 12V Taillight + Turn Signal Kit fixes that with bike-specific wiring that plugs straight in — here's the whole install.
Verify your 12V power
Confirm your Electro & Co DC-DC converter harness is installed and working. Every connector in this kit is crimped and sized for that harness, so once it's in, the rest of this install is just plugging things together.
Mount the taillight
The taillight bolts to the stock mudflap mounting holes on the subframe using the longer screws included in the kit. No drilling, no adhesives, no modifying your bike — the mounting points were already there.
Install the handlebar switch
Slide the throttle and brake lever off the handlebar, slide the switch housing into place, then reinstall your controls. Take a second to angle the switch where your thumb naturally lands before tightening everything back down.
Connect the wiring
Every wire is already crimped, labeled, and sized for the Electro & Co harness — match the labels, click the connectors together, and route the loom along the frame. No cutting, no soldering, no guesswork.
Add the horn (if you picked one)
Added the optional horn at checkout? It mounts behind your front number plate, using the same screw point the plate already mounts with — swap in the longer bolt included with the horn, slide the horn onto it, and tighten the nut. Then plug it into the kit's harness like everything else. (This is the add-on horn that runs off the lighting kit — not the same thing as our standalone Horn Kit, though they mount identically.)
Test everything before you tuck
Power on and run through it all: taillight, brake light, left and right signals — and give the horn a honk if you added one. Turn the bars full lock both ways to make sure nothing pulls tight. Once everything works, zip tie the loom clean and go ride.