I mounted a loud horn and installed a 12v power outlet in my trunk. On the rear fender the right plug is for my trunk brake light and the left is connected to the power outlet i put in last weekend. The holes in the fender are the factory holes from the tool bag, which is now in an otterbox under the rear fender. When its parked, the 12v plug gets unplugged on the fender and my battery tender gets plugged in. I also mounted my fuel bottle inside the trunk.

 

Which horn did you go with? Others who have upgraded their horns have said it required a dedicated 10A fuse and relay.

 

I tried many, including the hella sickhorn copy, which sounded like a buzzing fart. I tried to find room and conceal-ability of a stebel to no luck. Then i found a 2 horn set at harbor freight on sale for 10 bucks and thought i would try those. After finding a place behind the gas tank fairings to mount on the gas tank bolts, i tested both horns, the low horn was useless but the higher pitched horn was LOUD and sounded good. So i decided to make a bracket that attaches to the factory horn mount location since i was only mounting one of the horns. They are chrome plastic, so i sanded and painted it black to hid it. Not the perfect location but tolerable and its loud and it was cheap. It would have been easier hiding it if i removed the smog canister, but i didn't want to do that. Stock wiring is fine, i was going to wire in a relay but it wasn't needed

 

I use that HF horn on my SV-it definitely gets peoples attention.

 

You mounted a box under the fender?

 

Yup a waterproof otterbox 2000 like the link below. Its mounted to the license plate bracket screws underneath. You cant see it unless you look for it.
Otterbox 2000 Waterproof Drybox Crushproof Phone Camera Card Airtight Case Black | eBay

 

Did you make sure the tire couldn't hit it if you came close to the limit of your suspension?

 

Of course...

 

Oh, I thought you meant under the fender, as in, on the bottom side of the fender (parallel with the fender).

That's cool. Another idea is having it bolt to the mud guard where your plate goes and then bolting your plate to the box, similar to this:

License Plate Locking Compartment :: Aerostich/RiderWearHouse Motorcycle Jackets, Suits, Clothing, & Gear

I bought that hoping that that the tool kit would fit in it. It doesn't.

 

I already had the extra otterbox and i doubt someone will try and steal my spark plug socket, lol
I put stuff i dont want stolen in my trunk.