I fixed my fuel level sensor; the weld had failed. I used baling wire. I felt like a bit of a bodger, but it worked right up 'til the motor packed it in.
Anyway, there are many mileage threads on here. I got awful mileage on the 'dent & very similar mileage on the new Sprint. Most of the differences between people's mileage can be attributed to 3 things: US vs UK gallons, Mikuni vs Keihin carbs, & light vs heavy right hands. (I use US gallons & have Mikuni carbs & a heavy right hand.)
Cheers,
-Kit