Ebikes are not motorized vehicles, at least in Seattle. An e-bike requires pedaling to control your speed (it does not have a throttle like a car or motorcycle)

Ebikes are not motorized vehicles, at least in Seattle. An e-bike requires pedaling to control your speed (it does not have a throttle like a car or motorcycle), it is speed limited (the motor only helps until 20mph, above that you pedal to go faster). If your vehicle has a throttle and doesn't require pedaling, or the motor provides for speeds above 20-28mph (depending on some factors), then the regulations agree with you. A bike like the Tern HSD is not legally classified as a motorized vehicle.