12v motorcycle alarms

does anyone know of any good quality alarms for motorcycles? I am wanting to put one on my 2005 yamaha R1. more than once now I have come out of a store to find some punk sitting on my $12000 bike. I am hoping to deter this, and hopefully prevent my bike from getting damaged.thanksjmacf14

I've installed a couple of these for friends, they're extremely pleased with them. Life moves pretty fast; if you don't stop and look around once in a while; you could miss it.

Thanks Hornshockey, I saw a few of those on ebay, but didn't know anything about quality and reliability.I'll  look into those a little more.jmacf14

DEI merlin alarm, ive installed one, no probelms since they just came out with a brand new one this year with alot more featuresThere are 10 types of people in the world, ones that understand binary and ones that dont.

I put a lower cost pager unit on my bike, which is far less attractive to squatters, but still gives me peace of mind knowing it isn't being tampered with. This doesn't make any sounds or anything, but it's very flexible in allowing you to set up any sensors you want, and it'll indicate what caused it to trigger. I have it wired simply to be armed any time the ignition is off, and the pager doesn't require me to reset it once it sounds off, which I find very useful, because I can just leave the pager unit in my pocket. I like the range check feature on it too, which lets you confirm that it's in receiving range when you walk off to where you're going. Current drain on it is pretty low, so it suits the requirements for the small motorcycle batteries. Pager unit is very tiny, using a single AAA, and the unit itself is compact, making it easier to stash away.