Police hope witnesses to a serious motorbike crash can help them piece together what went wrong.
A man was critically hurt when he crashed while riding on State Highway 1 just north of Huntly around 2pm on September 10.
He was airlifted from the crash site near Fisher Rd to Waikato Hospital, where he remains in a stable condition.
Waikato Police would like to speak with anyone who may know what happened.
People with any information about the crash can call 07 858 6200 or contact Crimestoppers anonymously on 0800 555 111.