it mounts under the telelever. It took all of 10 minutes to open the package, read the instructions (although I almost didn't because it's so simple), install, initial tune. Took it out for a spin around the block and I was gone for over 2 hours. Keep in mind I just got back from a 3500 km trip and this was waiting in the mail. I didn't even unpack, I through it on and went for a rip fully loaded. I'll never own another bike without one.