Also... For those interested, my mileage is definitely better. 2.82 gallons (approx... I had already used 1/3 of the 4.7 gal before reserve based on my usual mileage) were used to travel 84.5 miles, resulting in 30MPG. Much better. I was was doing a sweepers run, mostly around 5-6K rpm the whole day, riding rather spiritedly.
I filled the tank on my run, so the true test will be running this current tank down. Based on this calculation, I should get about 225KM before hitting reserve.
Whether it was the new float valves, or setting 2/3 to full advance, that improved the mileage I'll never know... I'm not going to go undoing one of those to find out.