Cool Westy, i think the relatively light velosolex was advertised at 200mpg, not comfy but very economical.
My turn to Carl...
My gripe with the electric, hybrid green environment anti carbon thing is its hypocrisy, face it, it takes energy to make energy. Majority of power comes from hydrocarbons/radiation to produce electricity. There's even the added energy to properly dispose of batteries. Lets not forget energy it takes to make money, lots of it, the 40k to 100k takes energy, etc. So, i would like to see a wholistic approach to the Global warming problem, one that includes the energy of production, labor, and costs to the environment into the equation.
Totally irrelevant to your fuel economy goals, but my realistic question to you is how much did you spend sourcing new rims tires tubes, gears,etc whilest the old ones were useable. So at what mileage point due to the increased fuel efficiency offset the added costs of time, money, production and disposal. Riding 1k in miles isn't gonna gonna cover it, has to be more like 20k. My point is if you just kept your old rusty rims, tires and sprocket it would be much more economical and beneficial to the environment.
Isn't it strange that when you were a kid riding the same moped that it was economical enough that you didnt really worry about wasting money on gas and just riding? I think this is the true spirit and original intention of the manufacturers at that time. Dont get me wrong i like that you have documented your findings over time and have stuck to the same post for continuity, very important! I do find it interesting your attempts at increase fuel efficiency kinda the total opposite of what everyone else is trying to accomplish, funny.