What happens if your four wheeler runs out of oil?

if your quad runs out of oil 1 of 2 things will happen. the crank bearings will over heat and shred apart and that will cause your piston not to rotate around the crank like its suppose to and it will beat up your cylinder walls pretty bad. the other thing is if the crank bearings don't go first the piston could get the cylinder walls hot and fuse itself into the cylinder. i had the tube that oil flows from the reservoir into the case break and it shredded my bearings. $700 worth of parts.