The Helite airbag uses a rope tied to the bike to activate the vest. There are other airbag vests that uses sensors to trigger it. Of course, higher tech means higher price. One type of vest, you have to install sensors on the bike and those sensors communicate with the vest and tells it when there is an accident. Another higher tech one has the sensors on the vest so you don't have to install anything on the bike and you can wear the vest on any bike and it will still work.
There are three main types of airbag vest from what I can see.
Tethered system. This one is the Helite airbag which uses a rope tied to the bike to trigger the vest. The vest will work on any bike since you can tie off to it. This one is lower tech, but it is cheaper.
Con: can be accidentally triggered like if you walk away from bike and forget to untie it or if the ropes gets tangled and pulled on. Also it is a little slower at activating than the next two types.
Sensor system. There is a controller unit on the vest that communicates with sensors on the bike. The sensors on the bike informs the vest when there is a crash and the controller triggers the vest.
Con: higher price, you need to install the sensors on your bike, and it will only work with the bike that has the sensors installed.
Standalone sensor system. Similar to the previous one except the sensors are on the vest so you don't have to do any installations. The vest will work on any bike since everything is integrated into the vest.
Con: Higher price
Don't take my word for it. I'm just a foolish newbie.
When in doubt, just know that I am only joking around.
Top speed is 112 mph at ~7900 rpm
Blacked out engine
Dry rusty splines finally lubed for the first time
R/R relocated to the side of fuse box
Rust removed from tank
In line fuel filter, 23-28 micron rating
LED turn signals & brake light
16 color LED engine light up & underglow