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How to Install a Stebel Nautilus Air Horn on a Harley

Because a motorcycle is not so much a vehicle as a cloak of invisibility, bikers who love life are often characterized by automobile drivers and other potential assassins as obnoxiously loud. A favorite way to rouse the ire and attention of drivers who like to text message while listening to rap music is the very loud bike horn. And the most famous loud horn is the Nautilus Compact Motorcycle Air Horn which the manufacturer, an Italian company named Stebel, describes as "shockingly loud."

Instructions

1

Remove the Allen bolt and washer from the seat tab that fastens your seat to the fender. Remove the seat with your hands.

2

Disconnect the cable from your negative battery terminal with an open end wrench. Disconnect the positive terminal.

3

Remove the elbow contacts from the spade terminals on your original horn. Remove the Torx screws and washers that fasten the horn bracket and the upper stabilizer link bracket to the frame with a Torx driver.

4

Remove the horn and bracket from the frame. Remove the horn from the horn bracket.

5

Enlarge the bottom hole on the horn mounting bracket with an electric drill and a inch drill bit. Replace the upper stabilizer link bracket and horn bracket on the frame using a Torx socket or driver.

6

Cut the elbow terminal from the yellow/ black horn wire on the main harness conduit with a pair of side cutting pliers. Slide a 1 inch section of heat shrink tubing over the horn wire.

7

Splice the horn wire to one of the two blue wires on the Stebel horn. Cover the splice with the section of heat shrink tubing. Shrink the tubing with a heat gun.

8

Plug the second blue wire into the "one wire adapter" included with the air horn kit.

9

Plug the red and black wires included with your kit into the bottom of the Stebel horn air compressor. Route the red and black wires to the battery compartment.

10

Attach the red air horn wire to the positive battery terminal. Attach the black air horn wire to the negative battery terminal.

11

Mount the Stebel air horn to the horn bracket with the mounting bolt included with the air horn kit. Tighten the mount bolt with an open end wrench. Mount the horn so that it is vertical and the air intake port faces the rear of the motorcycle.

12

Replace the battery cables and tighten with an open end wrench. Replace the seat mounting bolt washer and tighten the seat mounting bolt and with an Allen wrench.