That's what I wanted to know. From pictures it looked bulky enough to get in the way if you mount it on your tank for instance, especially on a track as your head is going to be in the same area. I've actually seen shots where the view is obstructed by the underside of a helmet.
I wonder about the drag it creates when it's mounted to your helmet though.
On the tank it would be marginally in the way and the wide angle lens is so wide it's bound to pick up anything near it. It has a 170 degree viewing angle. For that mount the non wide angle might be better.
Although the tank is a good spot to mount it, this camera kind of begs to be mounted in more interesting places because of the mounts it comes with. We were talking about clamping it to a fork slider and checking that our next, pointed forward or back.
Mounting on the tank you can do with almost any camera because of the gas cap mounts available, and they'll all be in the way when you tuck.
On the helmet mount, The drag is marginal or at least unnoticeable to me when it's up there. Helmet is a decent place to mount but I hate the way it picks up where the rider is looking, like the quick shoulder checks and stuff. That's just my opinion though.