Stebel Nautilus horn instalation

Splash

Well-known member
Since the original post got deleted, here it is again.

Right now google still has the original post cached...

After being cut off or forcefully share my lane I decided to upgrade my horn. I looked at all my options and decided to go with the Stebel Nautilus horn. They sell 2 versions I went for the bigger one. The one I got the dual horn point down instead of off to the side.

nautilus1.jpg


Here's a little write up on how I installed it on my Z750. This might be useful to the three other Z750 owners in Canada. Take what ever you want from the write up and use it for your custom install.

On the Z750 there's absolutely no room for anything so I decided to install the horn near the throttle body on the left side.

nautilus2.jpg


Ran a 14 gauge (12 would be better) wire from the battery to the location where the old horn was. From the battery I installed a 20 amp inline fuse.

20_amp_fuse.jpg


nautilus4.jpg


then I covered all my wires in black heat shrink wrap. This way heat won't affect the wire.

nautilus5.jpg


I replaced the old horn with the supplied 30 amp relay and plugged the old horn wires to post 85 and 86.

nautilus3.jpg


nautilus6.jpg


nautilus7.jpg


I ran the wire from the battery to post 30 of the relay. Then I ran a wire from post 87 to the "+" side of the new horn.

Then I ran a wire from the "-" side of the new horn directly to the negative terminal on the battery.

To connect the wires to the new horn I used right angled insulated nylon female disconnect. I got mine at Sayal. That way the wires stay nice and tucked away.

nautilus8.jpg
nautilus9.jpg



Now that all the wiring was done I made a bracket that goes between the bolt holding the fairing and a threaded hole on the throttle body.

nautilus10.jpg


Took the compressor apart and painted it black then I put it back together. The horn and compressor just slides apart.

nautilus11.jpg


There's tons of room left

nautilus13.jpg


Here's the size difference between the original horn and the new one

nautilus14.jpg


On a scale of 1 to 10 for loudness, stock being 4, this one is a "HOLY CRAP THAT'S LOUD".


I like it
 
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Nice write up. Maybe should have posted in the "Technical" section?
 
Nice write up. Maybe should have posted in the "Technical" section?

your right... Hopefully a MOD will move it and delete these 2 post!

Thanks
 
20A fuse? You know that fuses are supposed to protect the wiring? If it doesn't blow when there's enough juice to melt the wiring, what good is it?
 
20A fuse? You know that fuses are supposed to protect the wiring? If it doesn't blow when there's enough juice to melt the wiring, what good is it?

The horn most likely peaks on current when the button is pressed to get the compressor motor running, then goes down a lot. The current goes over 20A for probably 1/4 second or so, which would be more than enough to blow a fast blow fuse. That's why they just swap it for 30A fuse. Even if you are crazy enough to run that HORN compressor continuously, that motor shouldn't push enough current to melt 14 AWG wire. That's my theory.
 
14AWG should only be rated to about 15A iirc?
 
14AWG should only be rated to about 15A iirc?
14GA copper can handle 20A maximum as a single conductor in free air; 15A when bundled with other wiring (http://www.okonite.com/engineering/nec-ampacity-tables.html). I would consider it a minimum gauge and think 12GA would have been a better choice in this application. 20A for a fuse is correctly sized for the load but only in combination with 12GA wire to ensure the wiring doesn't get destroyed. I chose 10GA wire for my Stebel instalation.
 
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14GA copper can handle 20A maximum as a single conductor in free air; 15A when bundled with other wiring (http://www.okonite.com/engineering/nec-ampacity-tables.html). I would consider it a minimum gauge and think 12GA would have been a better choice in this application. 20A for a fuse is correctly sized for the load but only in combination with 12GA wire to ensure the wiring doesn't get destroyed. I chose 10GA wire for my Stebel instalation.

Yet again, 15A continous current.
 
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