I don't know much about Motocross, but I doubt their goggles are ballistic rated/tested... I use
"ESS STRIKER Tactical THERMAL 'SC' Goggles" because they're supposedly able to stop a shotgun blast from 10 meters away, as well as a ".22 caliber military test"... I take care of my eye, and if I were you I would probably want to fork out a little extra cash to do so.