Join Date: Aug 2008
Location: western Massachusetts
Fill up every tank. Keep track of how many miles/kms you rode since the last fill up and how many gallons/litres it took to replace what you used. There are iPhone apps that do this, or there's the old fashioned log book method. Only takes a few seconds.
After a few tanks you'll know what you get for fuel economy on average, and that's a good supplement to a gas gauge. My average has been 52 mpg with a range of 45 to 55. With a 5 gallon capacity, that means I can expect from 225 to 275 miles until she goes "wa-cuh-wa-cuh-p-p-p-uhhhhhhh." Highway speeds and cold temps raise fuel consumption, as does a greedy throttle hand.
My rule of thumb is that I'm safe for 200 miles, then it's time for gas.
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