That's 34 MPG from my 1996 Honda Shadow V-twin 1100 that has aftermarket exhaust pipes and a dynojet carburetor jet kit installed, but it's supposed to be fairly close to Honda factory specs.
This MPG calculation is based on one tank full of gas and both the beginning and ending fill-up were done at the exact same gas station with the same nozzle filling it up the same level almost to the cap.
I'm a heavy guy probably about 340 pounds with all my gear on and this tank full of gas was used primarily on two rides one to a neighboring city to the west of me and a different day I rode to a neighboring city to the east of me.
I tried to take it easy on the throttle and I was cruising on two-lane roads at about 45 to 55 most of the way. But, I could not get into fifth gear very often. Traffic conditions and the twisting, curving roads I were on didn't allow much of that, so most of this trip I was cruising in fourth gear.