Can't say for sure about the Honda, but I know my KTM 520 numbers for comparison:
20mpg at full race speed (over 40 B) on a fairly open track with lots of sand (Skull Creek). 2001 / 2002
35-40mpg on the twistie back roads around Laguna Seca raceway (2nd thru 6th gear, raking the gearbox with extreme prejudice). I was happily shocked at the mileage numbers last week. We rode the pi$$ out of the bikes and did pretty good on the gas. I made about 90 miles on 2.5 gallons during one of the trips.
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"I'm neither Conservative nor Liberal, I'm Considerable!"
Tom Bailey
Team BFD
KTM 5-sumthin