Rat bikes are motorcycles that have fallen apart over time and have been kept on the road and maintained for little or no cost by employing kludge fixes and improvised repairs, with little or no consideration given to appearance. Rat-Look bikes are motorcycles that have been deliberately styled to look like ratbikes.Survival bikes (often confused with ratbikes) may look similar to but are different in purpose from rat bikes; they are modified for stylistic reasons to represent a post apocalyptic vehicle.