Moped Smaction

Blue: Pedals Required
Green: Pedals Not Required
Yellow: 50cc No Restrictions

Mopeds are far cheaper for young adults to get on than cars. A car requires all this heavy insurance and lots of gasoline and complex engine maintenance. A cheap moped can cost $275. Well, a used 4-stroke will probably run a few hundred more. Some weigh only ~150 pounds, and get "81 km/l". 81 km = 50 miles. 1 liter is 1.1 quarts, so there are 3.63- liters per gallon, giving us 181 mpg.

Some areas do not allow mopeds to travel faster than 25mph. But a moped could probably be coaxed up to a much higher speed. Some also have pedal assists. This site produces stats for Hero mopeds. They appear to be 49cc.

The Jawa 50 Robby is a 4-stroke moped. It goes 28mph with a 0.0419Hp/kg power ratio.
The Honda CD 50 Benly is a 4-stroke moped with a 0.05Hp/kg power ratio. This figure should be high on vehicles. The honda does not list the speed, but simply by having a higher Hp/kg than Robby, it will probably go faster. This Yamaha YB 50 has 0.0471Hp/kg, but its name is annoying. The YB-1 Four is almost as annoying, but has 0.0494Hp/kg, but its compression ratio is lower than the Honda.

This Honda V-2 Magna cruising moped makes 26.82Hp, and weighing 372 pounds has a 0.1559Hp/kg rate. The MPG on this page must be inaccurate. I'm really looking for something with pedals, though.

No obvious pedals here, but the Honda Monkey 50 has the highest smallbike Hp/kg at 0.0534, and it's also a 'naked bike', which means almost nothing to me, except that it's 60 pounds lighter than the others. It's also got a lot of positive remarks. I might swing for a monkey. NAKED!! Someone said $500 euros. Someone else said 450L$, which would be like $700.

http://www.mopedshop.com/
http://www.bikez.com/mopeds/index.php
http://www.mopedarmy.com
http://www.worldwidedistributing.com/GL%20MOPED.htm $895 for this motorcycle-shaped moped.

But enough non-tech talk...

This is how to get your moped to go 90, minus safety precautions.

The following is how to tweak your moped to do 45 or 60 thereabouts: