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The organising club has upheld its decision originally made in December.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:-
Netball: Manx Rams suffer second defeat in closely fought match in Singapore
Isle of Man held to 38-39 loss against Singapore A
Football: Union Mills and Ramsey play out eight-goal thriller
Corinthians women's win derby
Rugby: Ramsey through to Cheshire Bowl final
They beat Southern Nomads to progress
Hockey: Bacchas A closing in on Premier League title
Celts win southern derby
Interim FC IoM boss praises squad for adapting well to managerial change
Rick Holden has been in charge of the Ravens for almost six weeks