Modern Vespa

So - I was impressed with BigFoot's foray into mounting a Stebel Airhorn on the P200, but all that cutting and finagling looked too much for me. However, I DO need a new horn, as the previous owner had set my scoot up with a 6V AC horn for some reason and it sounds like butt not surprisingly.

I was going to get a standar P replacement for the typical $30, but noticed Scooterworks is having a sale on this stebel:
http://www.scooterworks.com/Horn_Stebel_TM_80_Magnum_Sing_P5651.cfm

Any thoughts on getting this guy to fit under the horncast? I think it could happen!

3" x 3.5" x 3"

I've got a Nautilus in one hand and a P200 horncast in the other...ain't happnin'. Not even close. Probably not even separated. The lower fork bearing is in the way. Let us know what you do.

i don't know about mounting it in the p200 but i do know that the magnum is smaller than the nautilus. hope it works!

Yeah this looks much smaller than the nautilus. 3"x3.5"x3"

it's actually the one that i want to put in my ET.

I remember seeing a photo of two nautiluses installed under the front fender. It was pretty cool, and didn't mess with anything aesthetically.

that's not a bad idea, i ended up putting mine under the glovebox

Apples and oranges. The Stebel Magnum if a different size and shape compared to the Stebel Nautilus compact.

the magnum certainly looks like it's only slightly larger than the dimensions of most of our horns.

I bet it would fit under a lambretta horncast, or a T5 / PX millenium one without too much trouble...if you removed the existing horn.

Nobody ever said it MUST be mounted in the horncast. You can mount it in the glovebox if you want. It's so loud that it won't matter.

OK... i've had an idea.


the GS and SS i have... both non battery. Both have a large bit of unused area where the normal EURO version of the bike would have a battery / rectifier circuit.

I'm trying to brainstorm how i could bodge a small 12v accessory battery, rectifier, and a Stebel horn in this area.

I'd want the existing horn button to operate the stebel.

So... it would seem i have a couple of options:

1) Replace my existing load balanced setup on the GS / SS stator with the $24 scooterworks 12v bajaj lighting coils with a single output....rectify that...and replace my harness with the scooterworks EIK harness. The upside is that i'm 12v regulated.. can run 12v bulbs and such. I can easily power a 12v rectifier. Downside is i'm converting my bike away from stock....which i don't want to do in a non-reversible way. But... pulling the original wiring harness back through the bike isn't necessarily non-reversible, either.

2) Figure out some way to make my 6v load balanced setup power a 12v rectifier ....presumably off the green circuit.... in order to charge the battery.

Is that even possible, MDchanic?

You should talk to Bar Italia Kristian about this. Not sure exactly what he has hooked up to what, but I know he has some kinda monster horn running on the spare side of his Rally180.

My other concern is I've read some hooplah about these power horns toasting horn buttons. Anyone here know about that?

OP mentioned "air horn" so I assumed Nautilus. You are right, he had the link to the Magnum.

BUT...

I also ordered a Magnum from Motosport with the intention of putting it in my P200. It won't fit. The void at the bottom of the horn cast is filled by the lower fork bearing. No way. The small, wimpy original horn just fits.

My P200 came with two horns mounted to each side of the outside of the horn cast. they are black and don't look too bad. I have seen pictures of similar mounts on this forum. They resemble Magnums with the circular horn and were made in Italy, can't remember the brand. They don't work very well. I don't know if they have an electrical problem or are just sick. Occasionally they both blow together strongly and it sounds OK, but it's not dependable at all.

Yes...

If you use your existing wiring harness to try to just ..."swap out" your old horn for one of these, the horn will draw more current through your tiny wire than your old horn did.

This will burn out your wire, or potentially your switch where the current also travels to ground ( when you push the button, you ground out a circuit allowing juice through the horn ).

But ... no big deal. Every stebel includes a relay that you hook up.

If you don't know, a relay is like an electromechanical switch. You basically can set it up so that when you press your normal horn button on your normal switch, the relay SENSES power in that circuit, which then makes it CONNECT the circuit of battery power to Stebel horn.

So, no heavy current goes through your switch or old wiring - it's confined between the battery source and the stebel itself.

my brain is on fire with ideas for my GS about this setup.

I must go home to the laboratory!

The bigger Stebel comes with a relay included so as to not burn out your horn switch. At least mine came with one...

Where is Jimmy - he mounted his on hte legshield on his P200.

Will these work without a battery?

Nope. Requires a direct wire to the battery to hookup.

it's not pretty, but the holes were already there from a leg sheild i guess

frikkin loud

Not on a P200, but I have a Stebel Nautilus Compact installed on my Super 150, mounted out of sight within the left cowl glove box:



The horn needs 12V power, and the Nautilus does, indeed, come with a relay. I believe that the Magnum doesn't actually use an air compressor, or at least not in the same way if it does, and can be safely mounted without the relay, but the Nautilus won't work well without it and -- of course -- you run the risk of burning out a horn button.

As I have a 6V batteryless scoot, I have a 12V 18a/h sealed lead acid battery in the glovebox too (under the horn), and use a trickle charger about once a week to keep it topped up.

You can hear the horn here.

It would be fairly easy to run the leads for the relay to the horn button itself, as I ran a switch for my lights out to the end of the throttle tube without much trouble.

Wow..i really like what you did there.

Nice placement of the light switch...very clever.

You canadians are alright. I suppose we'll allow you to stay on our continent... for now.

Hey guys soo.. i Just found a really AWESOME place to put the stebel if you do decide to do it... it mounts to the battery tray there is a hole there... you can use the bolt they gave you to mount it..!!

Right about now the NSA/CSS terror prevention internet imaging scanners are going crazy...

Hahahaha i guess you cant say bomb either huh??

Tits the BOMB!

Another one is"Asama Obama" right

Looks like it will work out installed like that. As long as it won't get in the way of the cowl or rectifier.
Can you here it rattle around when you drive ?

Here's another possibility, mounted on the rear rack, with the horn button on the left floorboard.

it doesnt get in the way of the cowl or regulator... you can take them off and put them on easily..!!!!! And as for having it mounted ont he rear rack im not a fan of that only due to weather..... if any type of moisture gets in there its game over for it..

Moisture?What moisture? Oh, I forgot... you don't live in the desert Southwest.

the desert..!!? lol haha... The coldest summer is a summer in San Franicsco..!! hahah