Mini motor vehicles, commonly referred to as “pocket bikes” or "mini choppers,” do not meet federal safety standards for use on public roads. Their use is limited on public roads to designated parade routes. If using a mini motor vehicle on a parade route, it must be insured with a minimum $200,000 third libaility policy. This coverage is not provided by ICBC.
The reason that these vehicles aren't generally allowed on public roads is because they don't meet minimum height specifications for headlamps, tail lamps, stop lamps, and turn signals. They're also difficult for other motorists to see.
Transport Canada classifies mini motorcycles as restricted use motorcycles that are permitted to be imported as competition vehicles for closed-course racing only.
low-powered vehicles (PDF)
Federal vehicle safety standards, regulations and more:Transport Canada