I think if you set the motor out of tune by making it very rich on the idle; then adjust it properly. Again you could the same for the top end (making it rich) then adjusting it.

I can understand making the motor too lean and how that can damage it; however, when a new YS is broken in it is run rich and tuned for performance after it's broken in. I think a video could be made without any issues.

Regards,