Police are hunting for the culprit, who made off with a Husqvarna fc450 motocross bike from a garden in Ochil Drive at around 8.45am on Monday.
The bike was later seen in Easton Drive that morning.
Pictures emerged online showing a person riding the bike while wearing what appears to be a white face mask.
There have also been sightings of the bike in Slamannan and Shieldhill.
Police inquiries are ongoing.