According to Honda's Australian YouTube channel the child riding the Honda CRF50F in this ad is following in his dad's footsteps, as he also rode a Funbike as a child. In the very same back yard that was used for the shoot. After seeing the film crew in action, the child's grandmother announced she had old Super8 footage from 30 years ago which was subsequently used for the opening scene.
I think what's more interesting is that at 15 seconds into the ad, you get to find out who's responsible for one of the worst paint schemes ever conceived. Now 'that's amazing!'