In the first incident, a motorbike was taken from an address on St Georges Road at around 2:30am, before being abandoned a short distance away.
The suspects are believed to be four males and are believed to have attended an address on South Park Road at 3:20am, where a rare Aprilia RS250 motorbike was stolen.
The motorbike in question has distinctive bubbling on the surface of the fuel tank which should distinguish it from similar bikes.
Officers are appealing to residents in the area with CCTV, doorbell video and any passing motorists with dashcam footage to check their devices in case the suspects have been captured on camera.
You can also email [email protected]
If you wish to remain anonymous, you can provide information to Crimestoppers on 0800 555 111, ensuring that you quote North Yorkshire Police reference number 12210185790.