Mk111 horn mounting

I should have mentioned above that they're mounted on a 1/4" bolt on the "z"-plate immediately above the rear footrest hanger bolt (shown in photos).
I think Mk3's already have a hole there on the RHS - anyway, very easy drilling.
Made a 2.5mm SS plate and a spacer tube to get the horn in the "right" position. Used Loctite Blue to ensure they stay put.
These units have a higher current draw so I put a small relay in the headlight bucket - very little wiring mods. Use the horn button wire to 86, grounded 85, 12V power to 30 and connected 87 to the horns (most will know this - but some may find it useful - all(?) relays have these terminal numbers). BTW mine is negative ground/earth.
This horn position directs unobstructed noise forward and does not interfere with passengers feet.
Cheers
 
r
robs ss said:
I should have mentioned above that they're mounted on a 1/4" bolt on the "z"-plate immediately above the rear footrest hanger bolt (shown in photos).
I think Mk3's already have a hole there on the RHS - anyway, very easy drilling.
Made a 2.5mm SS plate and a spacer tube to get the horn in the "right" position. Used Loctite Blue to ensure they stay put.
These units have a higher current draw so I put a small relay in the headlight bucket - very little wiring mods. Use the horn button wire to 86, grounded 85, 12V power to 30 and connected 87 to the horns (most will know this - but some may find it useful - all(?) relays have these terminal numbers). BTW mine is negative ground/earth.
This horn position directs unobstructed noise forward and does not interfere with passengers feet.
CheersRob
Click to expand...
Rob, do you think it makes any difference which way the horns point?
 
cliffa said:
r

Rob, do you think it makes any difference which way the horns point?
Click to expand...
Maybe not - but, in theory it should! Anyway, if I mount them there I'm not going to point them anywhere else than forward.
I'm a fan of Doppler!
 
robs ss said:
Maybe not - but, in theory it should! Anyway, if I mount them there I'm not going to point them anywhere else than forward.
I'm a fan of Doppler!
Click to expand...
Ok, so I know this sounds rather anal, and it's your bike, but I reckon they would look better pointing backwards, as the round rear of the horns would follow the curve on the Z plates (i.e. concentric). Probably less likely to get dirt & sand etc. in them as well.
 
cliffa said:
Ok, so I know this sounds rather anal, and it's your bike, but I reckon they would look better pointing backwards, as the round rear of the horns would follow the curve on the Z plates (i.e. concentric). Probably less likely to get dirt & sand etc. in them as well.
Click to expand...
I'll think on that and let you know.
Cheers

PS - sorry @andre1 for a possible thread hijack here - but I think it is in line with the thread.
 
marshg246 said:
Even if you let them hang straighter down you would have no oil hose binding and you would have lots of room for the cNw cable. The way I have it should work just fine with the e-start too, but I would probably at least lay the cable in place before installing the horns as that cable is a bit of trouble getting through where you want it.
Click to expand...
Greg,
One last question. I just received the horns and on the package it says “Do NOT remove,adjust,or alter the bracket in any way “.Is this just to make sure the strap has a good ground?I want to pivot the strap for a better fit and I don’t see any problem as long as the connections are properly installed.Am I missing something?
Thanks,
Mike
 
YING said:
Greg,
One last question. I just received the horns and on the package it says “Do NOT remove,adjust,or alter the bracket in any way “.Is this just to make sure the strap has a good ground?I want to pivot the strap for a better fit and I don’t see any problem as long as the connections are properly installed.Am I missing something?
Thanks,
Mike
Click to expand...
You'll find the nut very tight. I loosen, arrange how I like, use blue locktite, and tighten very tight. On Nortons I don't use the frame as ground - you'll see a red wire that foes to the harness. However, it should work fine to use the cradle as a ground since the engine is grounded.
 
marshg246 said:
Just installed a new harness on a 69S for a customer. Mufflers off, chainguard off, chain disconnected, rear wheel off, tail light disconnected, and rear fender off. Then the horn is easy enough. (Mufflers and chainguard to get the old harness out, for just the horn they don't need to be removed.)

On my builds I usually don't use the standard horn because although easy enough to install during a build, I don't like the oil lines being cramped by the horn and $6 aftermarket horns are much smaller, louder, and draw less current. You can mount aftermarket horns in the standard location, but I usually put them in the battery area.

These work very well: Amazon product ASIN B01EG18SDE On Triumph Tridents I use two. On Nortons, usually just one.
Click to expand...
Amazon says 4-5 weeks for shipping “usually”? Danged.
 
jamesp said:
Amazon says 4-5 weeks for shipping “usually”? Danged.
Click to expand...
??? Just looked, says one day delivery and I've ordered them 6 times and they have always been one-day delivery. I do have prime bit AFAIK, that only takes away the shipping charge.
 
marshg246 said:
??? Just looked, says one day delivery and I've ordered them 6 times and they have always been one-day delivery. I do have prime bit AFAIK, that only takes away the shipping charge.
Click to expand...
I looked again and saw the same 4-5 weeks delivery with a September due date. I tried to copy and paste it here, but it didn’t paste well. I was surprised at that length of delivery time. We may be looking at different sellers. I also have Prime. Anyhow, someone has graciously said I could buy their’s if I decide to change. Thanks.
 
Last edited:
YING said:
Greg,
One last question. I just received the horns and on the package it says “Do NOT remove,adjust,or alter the bracket in any way “.Is this just to make sure the strap has a good ground?I want to pivot the strap for a better fit and I don’t see any problem as long as the connections are properly installed.Am I missing something?
Thanks,
Mike
Click to expand...
These warnings are on most aftermarket horns I have used in the past. I believe it is because the mounting bracket permits correct resonance of the whole horn, the horn is tuned to work with that bracket. Altering it will affect horn output, volume and/or frequency.

I run the Fiamm Freeway Blaster Low Note horns on both my bikes and had them on cars. Very effective in modern traffic when needed. On Commando it is mounted in stock position without much trouble using its included bracket.
 

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