At the border I filled three 16oz bottles with gas to be sure. Last time I road thru Burns Junction the station was closed and I nearly ran out when I was on my Sportster with a 4.2 gallon tank. The cb has 3.8 gallons and I was averaging 43mpg in the morning. That should be a 163 mile range and maps says 149 between McD and Burns. After 50 miles I added the extra to be sure. Bike says I still had 24 miles when I got to a station in Burns.