They are all different, there is no standard number across bikes
Could be so many variables, air temp, fuel temp, how you've ridden, tyre pressures, chain tension, length of trips, all could change mpg

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you win some, lose some, crash some
K+N filter, snorkel removed, homemade kev mod (with his blessing), co raised,
Pipeworx cans, r1 led back light, under tray removed, small indicators, handguards, cnc short levers,