[akod]

Hi:

Looking to update the standard Horn. Less beep-beep and more honk-honk. I've installed on other bikes before.

Anyone have any recommendations or know of any install issues with this PIAA Sports Horn (click for link on PIAA site)?

Mostly concerned with the wiring harness and if it'll fit as-is "plug and play" - a little bracket bending is always fair game .

Thanks all!

AK

 

[akod]

Icon by the way - didn't think it would matter as clearance is the same it looks like.

 

[silverluxe]

I don't think the stock horn has a relay in the circuit. The violet wire (positive) from the horn goes to the handlebar switch which then goes straight to the battery. You might want to set up a relay system so you don't risk burning up the switch in the handlebar or possibly the wiring if it's too small.

I made that assumption after looking at the wiring diagram.

 

[outofthebox]

I'm in the market for a louder horn too. I had short-listed this one (IMO would blend in better):

 

[akod]

Tried a couple horns as there is not much space in there because of the plastic cover in the front and side.

Only the PIAA "Slim Line Sports Horn" #76501 would fit so I could still fasten the 3 star nut bolts to secure the cover. The key was bending the bracket at a right angle as close to the center as possible, with the label pointing down. There is no other way this horn would work unless the bracket was a bit longer.

The Black wire is the (+), attached it to the connector on the horn closest to the bracket. Purple goes below it.

 

[outofthebox]

Hi @akod can you please post some pics of the horn installation on your bike?

 

[akod]

A snug fit but worked after the bracket bend.

 

[outofthebox]

Brilliant! Thanks for the effort in sharing the pics. I dropped the idea of the Denali and the Stebel Nautilus and ordered the PIAA slmline instead.

 

[akod]

Good luck. Yeah - can't see either of those horns fitting unless you're willing to cut some of the black plastic cover away. They might work then, but I wasn't keen on cutting...

 

[keiyo]

A snug fit but worked after the bracket bend.

I'm looking at the second pic - where are you fastening the horn's metal attachment piece to the bike? Are you connecting the horn to that silver metal part that secures the stock horn?

 

[TransNone13]

I've fitted the Denali two piece horn and it fits well. although in a different location. It is far louder than the PIAA. I'll grab some video/picts.

https://vimeo.com/139647728

 

[akod]

Attach to orig bracket

I'm looking at the second pic - where are you fastening the horn's metal attachment piece to the bike? Are you connecting the horn to that silver metal part that secures the stock horn?

---> Attach the horn to the original mount on the bike.

 

[keiyo]

Quick update -

I finally got this horn installed. I ended up having to bend the silver metal mounting post over on itself so the PIAA horn could properly connect to the bike. I will be adding some heat resistant tape to the plastic parts of the horn since it sits dangerously close to hot metal bike parts.

As for the sound - it has a nice tone is is definitely louder than stock.

However, I did notice a slight delay from the time you press in the button until you hear the new horn noise. It's almost as if there's a slight build up to the horn's full loudness. I don't feel like this was the case with the stock horn. Anyone else experience this?

 

[Derek]

...However, I did notice a slight delay from the time you press in the button until you hear the new horn noise. It's almost as if there's a slight build up to the horn's full loudness. I don't feel like this was the case with the stock horn. Anyone else experience this?

Sounds like the horn draws a lot of current. A relay providing power direct from the battery (via an appropriate fuse) would give you an instant audible response.

 

[keiyo]

According to the Scrambler service manual, the stock battery is 12 volts, 1.2 Amps. The PIAA slim line sports horn requires 2.7 amps, according to the PIAA product page. Does anyone know if this means I need a battery upgrade with more amps (AH)?

 

[PSI]

The workshop manual states the stock battery to be 12V, 10Ah. That means the battery theoretically could deliver 10A at 12V for 1 hour [when fully charged].
But for a shorter time it can deliver much more current. For example, the electric starter motor is 12 V, 0.7 kW. That is a current of 58 amperes! Mind you, the starter motor current is only that high when you push the starter button and the engine is not yet rotating; once the engine starts to rotate, the starter motor current will drop rapidly.
So the current for the PIAA horn is not the problem; it's the internal resistance of the wiring to the horn and the current rating of the horn button on your handlebar. BTW, also a horn has a pretty high in-rush current.
That's why Derek is very right in advising a relay.

Regards,
Paul

 

[keiyo]

Derek, PSI,

Thanks for helping to explain this to me. Right now I'm still using the stock horn - as soon as I'm confident that the hot metal near the horn bracket won't melt the plastic PIAA horn I'll give it another shot with a relay.