My motorbike run out of oil

hi the amount of damage to your motorbike really depends on how long it had been running without oil or below the recommended level, I would advice that you consult your trusted mechanic and have it checked as to the extent of damage. It is possible that there is no damage so long as it was not runinning as in the case of being parked and the oil or the gasket just leaked, damage is really caused by what we call metal to metal or metal parts rubbing together with no lubricant or below the recommended level. Yeah next time make it a habit to pull out that dip stick and check if oil level is okay before running the engine or going on a trip