Did 120 miles on the road on 3 gallons, 15/47 gears with O/D 5th. I have a Zip -Ty 3.8 gal tank and pipe combo. Did 40 mile in the woods, hard riding, last Friday on about 1.5 gal 14/50 gears. Sudco 41mm carb 170 main , 58 pilot, clip in the middle. Sea level.... Hope this helps.