David Knight pulled out of the final round of the World Enduro Championship in Mendes, France on Sunday.
The four-times world champion said the dusty conditions made it too dangerous to continue.
'The dust was so bad in the special tests, especially in the Enduro test, that it was just too dangerous,' said the 33-year-old.
The KTM rider has only recently returned to racing after undergoing double hip-surgery.
Football: Braddan and Rushen United progress in Ecap FA Cup
Poor weather once again heavily disrupts local fixtures
Rugby: Ramsey take early lead in Counties 3 ADM minor conference
Celts win 'old firm' clash in Manx Cup
Hockey: IoM Ladies A march on in EH Championships
Bacchas B keep up perfect run in Men's Division One
FC Isle of Man's trip to Barnoldswick Town postponed
Travel disruption and player welfare behind decision
Hockey: Bacchas Men's B looking to keep up flawless league form
Two national teams in EH Championship action in this weekend's fixtures