Reigning Solo Champion Guy Martin is out of next week's Southern 100 meeting at Billown.
The popular rider escaped with relatively minor injuries after a high-speed crash at Ballagarey during last month's Senior T.T. race.
Despite wanting to make his comeback as quickly as possible, he has decided to accept medical advice and withdraw from the event.
The 55th Southern 100 meeting starts with a practice session on Monday evening.
Ravens on the road at Barnoldswick Town
FC Isle of Man looking to make it three unbeaten this weekend
Hockey: Bacchas Men's B looking to keep up flawless league form
Two national teams in EH Championship action in this weekend's fixtures
Rugby: Ramsey at home to face Dukinfield
Douglas and Vagabonds to meet in Manx Cup
Football: 'Take Two' for FA Cup first round clashes?
Most ties rescheduled from last weekend due to poor weather
Hopes new designated centre will see more people take up powerlifting
Powerlifting Isle of Man says former base in Castletown created 'barriers'