Centrifugal clutches are a bit different than the style of clutch you might be familiar with. They aren't used much on cars, but are commonly found on vehicles like scooters and go-karts. Like the ...

If you started with a pile of junk you picked up at any average flea market in America, including a chainsaw, a hand truck, a toolbox, a circular saw blade, and a little Razor Powerwing push scooter, ...