When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I bought mine used and it came with the extra siren kit. It chirps if you bump it. If you turn the switch on or stand it up off the stand, it goes nuts. Lights flashing and siren blaring for 15 seconds or so then it resets itself. I had to replace the rechargeable battery in it in case someone cut the main battery cable.
Export models included the siren as standard equipment, domestic models didn't. I have no idea why.
I'm going to guess there are several reasons in the case of the UK. One is simply the impression of risk of theft here, as Harleys are darned expensive, with high local taxes as well as import costs. Another is the insurance system here, which likes vehicles to have good quality anti-theft measures such as integrated alarm systems. Finally, we owners actually get savings on insurance premiums by having such things installed. Any cost of a factory installed alarm is quickly recovered on insurance savings. Even my new 1974 FX1200 had a factory alarm fitted as standard!
To my knowledge, the horn is never activated with the security system. However, the add-on module with siren and 9-volt battery does work well. And the siren is loud. Another however is, that the 9-volt can run down and the manual says about 4 hours ride time is necessary to recharge it. So, if the cycle sat in the garage all winter, the chirping might not work; this can deceive you to think that something is wrong with the system when there is nothing wrong.
For some reason, the 9-volt siren battery does not take a charge off of the 12-volt battery in the stopped cycle. Short of replacing the 9-volt itself, only riding will recharge it. Letting the cycle idle for any length of time just to charge a 9-volt battery is probably something nobody in their right mind would do.
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.
Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.
Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.