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.
Snooker: Malew stay top as Blinders remain unbeaten
Kirkham stars with 63-break during latest league fixtures
Cricket: Crosby receives grant boost to upgrade facilities
Club says it will 'meet growing needs' and 'enhance training capabilities'
Netball: Manx Rams undone against Malaysia
A fourth straight defeat for the Manx side at the Singlife Nations Cup
Late own goal earns FC Isle of Man draw at Euxton Villa
Ravens go five undefeated after six-goal encounter