Any hopes a last minute compromise would allow the Mid-Antrim 150 races to go ahead have been snuffed out.
The organising club has upheld its decision originally made in December.
They say there are still major differences between the club and the Motor Cycle Union of Ireland.
T.T. star Adrian Archibald says it's a blow to his sport in Northern Ireland:-
FC Isle of Man prepare to welcome league leaders Ramsbottom United
Ravens targeting season double over table-toppers at The Bowl
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First rounds of Cup, Plate & Bowl tournaments to take place (Fixtures: 5 Oct)
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Both on the road this weekend to begin competition campaigns