Fuel capacity discrepancy

Posted by Slimmers on Aug 24, 2011; 2:44am
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/Fuel-capacity-discrepancy-tp3279870.html

Hey, I was just wondering about the fuel capacity of my 1981 CB750. Manual says it holds 5.3 US gallons. When my bike started sputtering today, I switched to reserve and continued on my merry way. Manual says reserve is 1.3 US gallons. I made it only 18 miles and ran out of gas. Luckily I was 1/2 mile from a gas station and got a great workout pushing a 500+ pound bike that far. When I filled it up to the top, it only took 3.9 gallons to fill. Anybody know what's going on here?