Scottrevoman333 shares a tutorial on Instructables that shows us how to convert an atv to run on propane. This is a great way to see how to convert your atv to run on propane as a back up fuel source. There a numerous reasons one might want to do this. You might need a cleaner burning engine.
You might not want to store or carry large amounts of liquid fuel around, besides liquid fuel eventually goes bad, propane will not. Its easier to store large amounts of propane. In an emergency situation such as hurricanes and earthquakes, gasoline might not be available or if it is, it will be in high demand, propane usually is not. Click the link below to read more.