Two-time T.T. winner Shaun Harris has announced his immediate retirement.
The New Zealander was planning a dramatic return to racing around the Mountain Circuit at this year's meeting.
He was seriously injured in the 2007 Superstock race when he came off at Union Mills on the last lap sustaining major fractures.
Months of treatment followed at Nobles Hospital and in Leeds before he could return home.
He made a comeback to racing on Boxing Day and won at Wanganui on a
Triumph Daytona 675 on the Cemetery Circuit, decked out in a Three Legs of Mann helmet.
Fittingly the one mile course is known as the Isle of Man of the Southern Hemisphere.
The golden year at the T.T. for Shaun Harris was 2003 when he won both Production races.