How is this motorcycle travelling along expressway without a rider?

A video circulating on social media of a motorcycle travelling on an expressway has left some netizens baffled.

The reason? The bike was moving by itself.

Stompers Freddie, Rohaizat, Dean and Oinkz alerted Stomp to the video that they received via WhatsApp.

It is unclear where or when this happened.

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In the video, the motorcycle is caught on video moving along the expressway without a rider.

"What’s wrong with this? No one is riding?" asked Freddie.

It covers several metres before it appears to lose momentum and eventually veers to the side of the road and topples over.

Any idea of how this happened?