User Manual

PACKAGE CONTENTS

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MotoHorn trumpet air horn
MotoHorn 12V compressor
Air line
User manual
Bolts and rubbers for mounting

MotoHorn works on any vehicle that has a 12V battery

SAFE INSTALLATION

  1. Follow this user manual.
  2. Power off your motorcycle before the installation.
  3. Do not install MotoHorn directly to the stock horn wires, use 12 AWG wire.
  4. Avoid hard bends on the air line to provide free air flow.
  5. The air line can be extended without any loss of performance.
  6. Keep the compressor away from parts that produce a lot of heat.
  7. TIP: Install MotoHorn under the stock horn button and also keep your old horn for the best multi-tone effects.

If you follow the next steps, no mechanical or electrical knowledge is required

MOUNTING THE HORN

We recommend checking our gallery for different mounting solutions. The most common mounting spots are the following: front frame bar, under the saddlebags, on the side of the motorcycle.

Mounting examples:
https://motohorn.com/gallery/

If the original mounting edges can’t be used, some custom adjustments are necessary.

Many of our customers use a metal sheet as the trumpet mounting base and attach it to the stock horn bolt (common on different HD models).

VIDEO — FRONT FRAME BAR


For the front frame bar installation, it is best to use different types of o-ring clamps. This installation method works on all motorcycles that have an open front frame.

MOUNTING THE COMPRESSOR

The compressor has a small bolting edge and can be bolted down to any available bolt. You can hide it underneath the saddle or under the stock horn cover. Leaving it open visible works well too.

WIRING THE HORN

We recommend this wiring method for peak performance and to avoid electrical problems. This wiring method also allows you to keep the stock horn for train-like multi-tones. You will need:

  1. Some 12 AWG wire.
  2. Some thinner 18-22 AWG wire.
  3. A 4 or 5 pin 12V relay switch, rated between 20 and 40 amperes.
  4. Some crimp spade terminal connectors for those wires, relay, and compressor pins.
  5. (Optional) 30A inline fuse.

A relay will look like this:

You can get these parts from any automotive store that sells electrical parts such as fuses and different wire gauges.

WIRING DIAGRAM

12 AWG WIRE IS THICKER WIRE
18-22 AWG WIRE IS THINNER WIRE

INSTALLING THE RELAY

We recommend keeping the relay closer to the battery. For example: underneath the saddle.

Use 18 to 22 AWG wire:

  1. Connect pin 85 and 86 to your stock horn wires.
  2. The positive and negative can be switched up on these pins. Your relay is now operational.

We recommend keeping the relay closer to the battery. For example: underneath the saddle.

Use 18 to 22 AWG wire:

  1. Connect pin 85 and 86 to your stock horn wires.
  2. The positive and negative can be switched up on these pins. Your relay is now operational.

FINAL CONNECTIONS

Use 12 AWG wire:

  1. Connect pin 30 to your battery positive. Optional: add 30A inline fuse on this wire.
  2. Connect pin 87 to your compressor positive.
  3. Connect the compressor negative to the battery negative.

If your relay has 5 pins, the pin 87a can remain unused.

You can upgrade this setup further by adding Dual Track MotoHorn for additional tones.

Congratulations! Your MotoHorn is ready to use!

Need help? Email us:
support@motohorn.com

Need help? Email us:
support@motohorn.com