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74 Commando Horn #740434
07/01/18 7:03 pm
07/01/18 7:03 pm
Joined: May 2007
Posts: 10,461
Pennsyltuckey
ricochetrider Offline OP

Moto Mojo
ricochetrider  Offline OP

Moto Mojo
Joined: May 2007
Posts: 10,461
Pennsyltuckey
My horn is dismal at best, I can hear it fine sitting still but even moving a little bit, the sound just disappears. I guess the mount is up under the rear wheel fender, beneath or behind the battery box? In a PIA location is the best I can get from asking. Posted some stuff on the F ace ok Commando page asking what folks have done and got many many smart ass answers with not a lot of helpful info. One guy did send me some pix on fa ce book messenger of mounting small air horns up under his seat somehow but these pix are tough to see whats what.

Its not a huge priority but at some point, I'd like to addresss this. Thought I'd ask what (if anything) people are doing or have done to "fix" the seemingly crappy Commando horn situation without mounting massive horns where they can be seen?

Thanks in advance for not posting wise ass comments. grin


"It is no measure of health, to be well adjusted to a profoundly sick society."

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Re: 74 Commando Horn [Re: ricochetrider] #740437
07/01/18 7:39 pm
07/01/18 7:39 pm
Joined: Sep 2007
Posts: 1,113
Ottawa, Canada
gREgg-K Offline

BritBike Forum member
gREgg-K  Offline

BritBike Forum member
Joined: Sep 2007
Posts: 1,113
Ottawa, Canada
The original location is dismal, so I opt for altertive locations. In the past, I have mounted them to the front tank mounts, with the trumpets pointing forward. Gives good sound dispersion, but is susceptible to rain water.

On the most recent Commando, I used FIAM horns (no trumpets), and installed them one on each side, just to the rear of the seat knobs.

.. Gregg


Spyder Integrated Technologies
Lucas, BTH, & Miller Magneto & Dynamo Restoration
SMITHS Chronometric Restoration
magneto@spyder-it.com
Re: 74 Commando Horn [Re: ricochetrider] #740451
07/01/18 9:22 pm
07/01/18 9:22 pm
Joined: Aug 2001
Posts: 2,589
Springfield Nebraska
Richrd Offline
BritBike Forum member
Richrd  Offline
BritBike Forum member
Joined: Aug 2001
Posts: 2,589
Springfield Nebraska
Twin fiaams, one bike on brackets hanging below coil bracket. From where reflector would mount.

Other bike used standoff brackets from air filter plate.


Rich (member ThreeMustGetBeers)
"It's not always about going fast. Sometimes it's nice to slow down" (Wendy E.2016)

69 bonney
72 commando
75 commando interstate
06 Suzu..Suzu.. uh appliance
couple of beesas a ducati
and the Snake Bike
and a Honda?
Re: 74 Commando Horn [Re: ricochetrider] #740490
07/02/18 8:24 am
07/02/18 8:24 am
Joined: Nov 2009
Posts: 2,168
Netherlands
Peter R Offline

BritBike Forum member
Peter R  Offline

BritBike Forum member
Joined: Nov 2009
Posts: 2,168
Netherlands
The position of the horn may be awkward, the advantage (if any) is that it is out of sight, most alternative solutions that I have seen stick out like a sore thumb.

In my "smart ass" reply to your question on Face ache, I mentioned that the original horns can usually be repaired, just drill off the rivets. clean the internals, that often suffer from water ingress, and reassemble the thing with small screws and nuts.


Peter.
1974 Commando 850
1972 Trident T150T
1961 Goldie DBD34
1969 Benelli 250 sport special
Re: 74 Commando Horn [Re: ricochetrider] #740498
07/02/18 1:27 pm
07/02/18 1:27 pm
Joined: Jul 2011
Posts: 10
Woodland, Cal. USA
G
Guido Offline
BritBike Forum member
Guido  Offline
BritBike Forum member
G
Joined: Jul 2011
Posts: 10
Woodland, Cal. USA
I went to harbor freight and bought their dual horn set. It is chrome but I painted them black and mounted them to the air filter back plate. Being black they kinda disappear and they are real loud. Makes me laugh at how loud they are. $10 at harbor Freight


'71 Bonnieville
'73 Commando Roadster
'74 Commando Roadster
Robbing the '73 for parts to keep the '74 on the road.
Re: 74 Commando Horn [Re: Peter R] #740500
07/02/18 1:36 pm
07/02/18 1:36 pm
Joined: May 2007
Posts: 10,461
Pennsyltuckey
ricochetrider Offline OP

Moto Mojo
ricochetrider  Offline OP

Moto Mojo
Joined: May 2007
Posts: 10,461
Pennsyltuckey
Originally Posted by Peter R
The position of the horn may be awkward, the advantage (if any) is that it is out of sight, most alternative solutions that I have seen stick out like a sore thumb.

In my "smart ass" reply to your question on Face ache, I mentioned that the original horns can usually be repaired, just drill off the rivets. clean the internals, that often suffer from water ingress, and reassemble the thing with small screws and nuts.



Peter, thanks for making one of the few sensible comments over there. At some point, I'll address this issue, and will definitely look at repairing the original horn. I do have two BIG, RED Fiamm horns. I'd love to use them, but sure don't want them to be "sticking out like a sore thumb".


"It is no measure of health, to be well adjusted to a profoundly sick society."

Re: 74 Commando Horn [Re: ricochetrider] #740507
07/02/18 2:30 pm
07/02/18 2:30 pm
Joined: Aug 2012
Posts: 704
West Virginia, United States
Beach Offline

BritBike Forum member
Beach  Offline

BritBike Forum member
Joined: Aug 2012
Posts: 704
West Virginia, United States
Here are 2 horns I have been thinking about. Right now I am using a horn off my BSA mounted between the coils.
http://www.aerostich.com/ear-cannon-air-horn.html
http://www.aerostich.com/fiamm-freeway-blaster-horn.html

I am looking for a place to keep horn a bit out of sight.


Bill
1974 Norton Commando
1966 Lightning
1965 Lightning Rocket
1966 Norton Atlas
1967 Norton Atlas
1948 Panhead
Re: 74 Commando Horn [Re: ricochetrider] #740525
07/02/18 5:02 pm
07/02/18 5:02 pm
Joined: Dec 2011
Posts: 57
California, US
P
Peter_Joe Offline
BritBike Forum member
Peter_Joe  Offline
BritBike Forum member
P
Joined: Dec 2011
Posts: 57
California, US
I replaced the original horn with a pair of used horns from a 2002 Subaru Forester. I chose them because of their small size and one has a high note and the other a low note. To install them I moved the mounting holes on the horns' stocks 3/4 of an inch inboard and then shortened the stocks accordingly. I fabricated a couple of angle brackets that mount the horns to the same place as the original. I also welded a couple of tabs on the new brackets so that the mounting bolts won't turn. That way you don't need a wrench to hold the heads of the bolts.

The horns can be repositioned on the stocks in 90 degree increments if desired. However, make sure that the adjusting screws do not turn at all. Also I used a relay which was more or less required in my installation because I rewired my bike using an ammeter. One advantage to this horn installation is that the return oil hose can be routed in a much more natural position without any sharp bends to the oil tank.

Getting to the horn is really not that difficult. You need to remove the rear wheel and then the rear fender. It should only take maybe 20 minutes to do that. Probably the hardest part of the whole deal is disconnecting the wires at the tail light assembly (wires could be delicate and possibly break in that area). It is pretty straight forward.

Here are a couple of pictures of my Subaru horn 'upgrade':


Sideview:

[Linked Image]


Rear View:

[Linked Image]


I hope this gives you some ideas,

Peter Joe

Re: 74 Commando Horn [Re: ricochetrider] #740589
07/03/18 5:02 am
07/03/18 5:02 am
Joined: Jul 2011
Posts: 10
Woodland, Cal. USA
G
Guido Offline
BritBike Forum member
Guido  Offline
BritBike Forum member
G
Joined: Jul 2011
Posts: 10
Woodland, Cal. USA
That is a nice setup. When I get my e start I'll have to move mine. If I can fit them then thats where I'll put them. Clean bike!


'71 Bonnieville
'73 Commando Roadster
'74 Commando Roadster
Robbing the '73 for parts to keep the '74 on the road.

Moderated by  Dave Comeau 


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