I considered the Innovv for a while, but saw a few reviews saying that the electronics are not reliable. When it works is great, but is not always guaranteed.
I have being using a GoPro3 pointed to the front for the last 3 years. It requires to change the battery generally after 1h30m of riding, I carry 2 extra batteries with me and use a 64GB mini SD card.
After your incident with the KTM, I considered the subject and decided to add another camera pointed to the rear. I decided to buy an Apeman 66 (
http://www.apemans.com/a66), paid 45 bucks on amazon and it works pretty well.
Seems to be available now for 39.99 bucks:
https://www.amazon.com/APEMAN-Waterproof-Wide-Angle-Rechargeable-Portable/dp/B01GE99L0KConcerning mounting:
a) In my vstrom I mounted each camera in each side pannier.
b) In my st1300 I mounted them both on top of the trunk.
c) In my Valkyrie: one camera in the front batwing, other in the trunk.