Belgian rider Femke Van den Driessche has been suspended for six years by the UCI in the first case of motorised doping in cycling.
Disciplinary proceedings began in March after the 19-year-old allegedly used a bike containing a motor at January's UCI Cyclo-cross World Championships in Belgium.
The UCI announced on Tuesday that its disciplinary commission banned Van den Driessche for violating its rules relating to 'technical fraud' while she has also been fined 20,000 Swiss Francs (£14,000) and been ordered to pay legal costs.
A Union Cycliste Internationale statement read: 'Ms Femke Van den Driessche is found to have committed a violation of art. 1.3.010 in combination with art. 12.013bis (technological fraud) of the UCI Regulations.
'Ms Femke Van den Driessche is suspended for a period of six years starting from and including October 11, 2015 and ending on October 10, 2021.'