- Jan 16, 2015
That may explain it entirely . That plastic/nylon tank is probably 3/8" wall thickness. Now if Norton made an interstate tank that would be very interesting . Say take out the knee cutouts or go wider or taller and make it a "real 5 gallons" accessible before the light comes on. That's almost 270 miles before gas needed . Well you may say "Tony you'll never last 270 miles". Id like to try .I would think the gauge of aluminum used in the metal tank is thinner than the thickness of nylon/plastic used in the nylon tanks.
Than can account for some of the increased internal volume.