Greg,
Here's my setup:
MPG: 36.35mpg at last night fill-up
Pipes: Sceptres
Airbox: Stock - no holes, stock snorkel, paper filter
AI: Removed
Jets: 122 mains/48 pilots
Plugs: Stock spark plugs
Carbs: Stock Keihin CVKs
Needles: Stock - no shims
Drive: Chain - Stock (17T front/42T rear)
Other: Ride two-up most of the time
Elevation: ~4 ft above sea level
But who looks at mpg? When 100 rolls on the trip odo, I've got 60 miles before I push. Usually at 130 miles I'll switch to reserve (have to). Never have run out of gas while on reserve, so can't say for certain that 60 per above is correct. This recent mpg was all mostly tooling along river roads at 25 to 35 mph in second or third.