A PC hero in my current Champions campaign has something similar, though his is a hoverboard bought as Flight along surfaces with OAF. Seems reasonable to me. One issue I see is that, if your PC's motorcycle can be taken and used by anyone, the Motorcycle-as-Power (MaP) writeup as shown wouldn't work. But if your player wants it to only work for him, then it's fine.
Another issue is that, as written, he can carry the motorcycle around with him everywhere - into an office building, up the elevator, into the bathroom stall with him, etc. As such, maybe it should be OAF Bulky (though this might lower his DCV, I'll have to check the rules when I can).
Another issue you may want to consider, as GM, is how the MaP takes damage. The Focus rules would give it 14 rPD / 14 rED, but 1 point of damage past that takes it out. You may want to adjust that (say, it has 8 rPD / 8 rED, and 10 BODY, and may lose some speed if damaged).
Anyway, those are my thoughts on it.