[aporigine]

I just sold the bike, but I had a 2003 Harley Electra Glide Standard, model FLHT. I was in the mkt for a touring bike, and the Hawg appealed to me because I'd owned a Big twin previously, and it was the lightest, simplest, most mpg'y tourer available then or now.

I left the engine "as is" but, once break-in was officially done, added a "performance" air filter and exhaust on the premise that freer breathing = better economy. Bad idea! I lost ~3mpg.
I also trimmed the fairing's windshield down to a vestigial 2 inches.
My other major mod was to install a Baker 6-speed gearbox with "stock" ratios 1-5 and a .88 sixth gear (fifth is unity). In summer '09 I was riding from LA area to CA's Gold Country and spent a few hot slow hours on hwy 99 going effectively 60mph, usually at a respectful distance behind a big rig. That is the one and only tank (cap. 5 gallons nominal, 5.05 gallons "my best fill") on which I broke 60mpg and 300 miles between fills.
cheers apo