Yes, there are sets that come with a box of attachments (including handlebar) that will fill just about any need (including underwater). However, there are offers without the box of attachments, so read the description carefully.
It works great ! That's actually the reason I got it for an under bike shot if the road. It does not come with mounting gear other then a small clip on the back. But u can get a case much like the one for a GoPro camera to fit it, hope this helps hit me if you have more questions.
I ride too and I can be an aggressive rider. If you ride a sport bike like me you are going to want to mount it below the windscreen on top of your instrument cluster. I wouldn't trust the mounting stuff enclosed. I would recommend spending a little extra money on the scorpion brand one with mounting kit and mounting it yourself(also reinforce it). This camera is more midrange and when I hit higher speeds it can't keep up as well as a scorpion or a go pro. Bottom line if mounting stuff is included (sometimes it isn't). I wouldn't trust it, I would DIY it or at least find a stronger adhesive because personally the vibration of my parallel twin combined with wind and speeds over 70 would shake it loose.
It'll work fine if u actually mount to the flip-visor on your helmet with velcro. There's almost no shaking when u do it that way. The only negative is it's pointing wherever your head is pointing. That can be good for filming stg off to the side though.