He was transferred to Western General Hospital in Edinburgh, where he died on Sunday, March 10.
Sergeant Nicola Young of Fife’s Road Policing Unit said: “Our condolences are very much with the man’s family at this difficult time.
“We continue to investigate the circumstances surrounding this and would urge anyone who may have information which could be relevant, and who has not yet spoken to officers, to get in touch.”
Anyone with information on the crash is being asked to call police on 101, quoting incident number 0230 of March 3 2019.