I bought the Mini-T Ladybug transmitter for my door and keep on the keychain with my Harley fob. It's smaller than the fob. Took about 10 seconds to set the dip switches and works about a half block away from my house. No installation on my bike required. Cost about $8.75 and when I get home, I pull out my fob, push the switch and chuckle about how much folks would pay to install stuff into the fairing to do the same thing. Amazon.com

http://www.amazon.com/Linear-Mini-T-...5064364&sr=8-3

 

I have 2 of on our both UC inside the fairing, they work good right in front of the door but in your case might be iffy cause of interference from other moving vehicles.

 

Have bought at least halfdozen of these for friends at Xmas and birthdays-- absolutly love them. About 100 feet as others attest, in the housing on softails and inside the fairing on my new roadglide. Love them but have always wondered how it affects the longevity of the bulbs since i have high intensity bulbs in the headlights. Would replace the bulbs more often for the convenience of the F@P. great product.
mike