Donegal's Raymond Porter has announced his retirement from road racing.
Raymond Porter was a former winner at the North West 200
The Lifford rider was struggling to find his form in the early stages of the season and quit after Saturday's Superbike race at the North West 200.
A statement from his sponsors, McAdoo Racing, said the Porter was hanging up his leathers "due to the extremely dangerous nature of the sport".
The 30-year-old was a former 600cc winner at the North West and also took a podium place at the Isle of Man TT.
"Knowing what Raymond has been through in recent months we fully respect his decision and wish him every success in his future life away from the sport.
"Road racing is much too dangerous to ask a rider to go out and compete at any level, let alone win international road races, when he isn't fully focused and committed," added the statement from the Cookstown-based team.
Porter had been due to compete at this year's TT and the McAdoo team are now considering their options ahead of the centenary races on the Island.