I love it. Small scale version of:
link:
http://www.jstraubel.com/EVpusher/EVpusher2.htm
For the motorbike, all you'd really need is a throttle control and on/off switch. Couldn't you leave it in top gear, accelerate electrically up to speed, then close the bike's ignition to fire the ICE and continue accelerating/cruising?
I don't think the ForkenSwift could handle the weight of the bike (even if only the front portion) cantilevered off the back, like that SUV. Might need a light 2 wheel dolly to put the bike's front wheel in and tow instead.
Halfbakery is so much fun.