Product Description
“World’s Loudest Motorcycle Horn”
Upgrade your factory horn with the MOTOHORN™ 3.0, a high-output motorcycle and powersports horn kit designed to deliver a much louder, more noticeable sound than many stock horn setups.
The MOTOHORN™ 3.0 is a strong choice for riders who want an audible safety upgrade for touring, commuting, traffic, rallies, and everyday riding. It is especially popular with Can-Am Spyder riders and is available as the Horn Kit Only or with the F3 Plug-N-Play option for compatible Spyder F3 models.
This kit uses a compressor-driven horn setup, so installation requires proper mounting, wiring, relay setup, compressor polarity, clearance checks, and secure routing. Make sure the horn and compressor are mounted away from moving parts, steering components, suspension travel, heat sources, and areas exposed to direct impact.
Choose the Horn Kit Only for universal-style applications where you are comfortable planning the mount and wiring. Choose the Horn Kit with F3 Plug-N-Play if you are installing on a compatible Can-Am Spyder F3 and want the easier Lamonster plug-and-play wiring path.
Installation space can vary by vehicle. Confirm available mounting room before ordering, especially if you want the horn hidden behind bodywork.
Fitment / Compatibility
Available Options:
- Horn Kit Only — universal-style motorcycle / powersports installation
- Horn Kit with F3 Plug-N-Play — for Can-Am Spyder F3 models
F3 Plug-N-Play Option:
- Can-Am Spyder F3 — 2015 to current / all models
Common universal-style applications may include:
- Can-Am Spyder
- Polaris Slingshot
- Touring motorcycles
- Cruiser motorcycles
- Adventure motorcycles
- Custom powersports horn installations
Compatibility Note: The Horn Kit Only is not a direct-fit kit for every vehicle. Confirm mounting space, wiring access, horn clearance, compressor location, body-panel clearance, and local horn/noise rules before ordering.
What’s Included:
Horn Kit Only:
- MOTOHORN™ 3.0 horn
- Compressor
- Required installation hardware
- Installation instructions or user manual
Horn Kit with F3 Plug-N-Play:
- MOTOHORN™ 3.0 horn
- Compressor
- Lamonster F3 Plug-N-Play wiring kit
- Required installation hardware
- Installation instructions or user manual
Specifications:
- SKU: MH-001
- Brand: MOTOHORN™
- Product type: High-output motorcycle / powersports horn kit
- Horn type: Compressor-driven horn system
- Options: Horn Kit Only or Horn Kit with F3 Plug-N-Play
- F3 plug-and-play fitment: Can-Am Spyder F3 2015 to current / all models
- Installation type: Universal-style installation or F3 plug-and-play option depending on selected kit
- Common use: Factory horn replacement, motorcycle horn upgrade, Can-Am Spyder horn upgrade, powersports horn upgrade
Correction on the video. The black wire coming from the battery goes to the negative side of the compressor. The short wire coming from the relay goes to the positive side of the compressor. When the polarity is backwards the compressor will suck air instead of blow.
Install video for Can Am Spyder F3
To install Motohorn on a Spyder F3 (2015 to current / all models)
- Mount horn to upper frame rail using provided clamps and M6 bolts as shown in video. Leave clamps loose enough to adjust as needed for clearance on side panel.
- Remove right side panel to install compressor and relay. Drill 8mm hole in plastic subframe to mount compressor as shown in video. Note positive and negative terminals on compressor motor. When mounted negative terminal will be toward the outside of the bike and positive will be toward the inside of the bike. Drill hole in plastic subframe and mount relay with ziptie as shown in video.
(Motohorn can be mounted on the left side frame rail but may require extending horn trigger wires) - Locate stock horn on the right side of the bike below the a-arms. Remove the horn trigger wires. Route horn trigger wires from relay to horn trigger wires on bike. Black wire from relay goes to green/blue wire - on stock horn wire. Red wire from relay goes to grey wire + on stock horn wire
- Route red and black wire with ring connectors to battery. Red wire goes to + positive side of battery and black wire goes to - negative side of battery
- Black wire from battery goes to negative side of compressor with provided female spade connector
- Short black wire from relay (87) goes to + positive side of compressor
- Tighten clamps on horn and test horn. Reinstall side panel and look for friends to impress
If you have any questions about this product email us at support@lamonstergarage.com
WARNING: California Residents - www.p65warnings.ca.gov
Product Videos
Custom Field
Product Reviews
27 Reviews Hide Reviews Show Reviews
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Moto Horn 3.0
This horn is LOUD!!! I love it ? very easy install with the Lamonster kit. Quality product as-with all the products Lamonster sells !!!
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Motohorn 3.0
Holy cow. I just installed Motohorn 3.0 on wife's 2023 F3L. Fairly simple install. When my son hit horn button, wife jumped. Very very loud. If people can't hear this horn they have bad hearing.
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MotoHorn
Easy install with LaMonster kit.
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Motohorn
Wish the horn was about 5" shorter, it would be easy to hide under the plastic.
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Motohorn
Absolutely one of the loudest things I’ve ever heard. Easy to install. Watched Lamont’s video it made it very easy.
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MotoHorn 2.0
With the harness and Lamont’s video, the install was super easy. If you want a horn that will get other drivers attention, this is the one. This thing sounds like a train horn! Money well spent.
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Motohorn
Wow! Watched your video on the installation of the horn. With some minor glitches, the video was pretty clear. Moved the horn a couple of times so that the side panel would fit back on. Great product! Would recommend the motohorn for all motorcycles.
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Motohorn - best ever
This horn stands up to its advertising and just as easy to install per your video - horn nice and loud and a head turner - thanks for having this product and making it so easy to have and operate.
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Motohorn 2.0
I bought this horn to get peoples attention while on the road. I don’t honk very much, but if I need it for a distracted driver, I want one to get their attention. This horn works great for that, it is very loud. It was fast shipping from LaMonster Garage and I followed Lamont’s video for easy installation. It is great! ??
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Motohorn 2.0
Installed on my 2021 Spyder F3 Limited. They will definitely hear this horn if and when it is required. Installation was not difficult (for a Spyder). Definitely satisfied with this product from Lamonster Garage.
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Motohorn 2.0
Super load and well worth the money... Easy install... If they don't hear this horn, it because they are deaf...
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very loud, easy,with plug and play hook up,love this horn
buy it you will be glad you did
