What are monkey bikes?

WHAT ARE MONKEY BIKES?

* Monkey bikes are a specific low-powered Honda, the Z50, introduced in the 1960s.

* But the term has been used to cover all small and mini motorbikes, including kit bikes available on the internet.

* Product Safety Australia says mini or monkey bikes can often be unsafe because they are not sold with brand names or serial numbers.

* It is illegal to ride them on the road as they are considered unregistered vehicles.

* The sale of mini bikes with unsafe design features has been banned since August 2011.

* The engines range from 49 to 150cc and they can travel at speeds of up to 80km/h.

* The council at Frankston - where a woman was knocked down on Wednesday - outlawed monkey bikes in 2007 and has since impounded 315 vehicles.

* A variety of small motorbikes are available online.

* Victorian Premier Daniel Andrews says the government will look at any changes it needs to make to tighten rules around monkey bikes.