Fuel Tank Cap - Yamaha YBR125ED Owner's Manual

Fuel tank cap

TO OPEN:
Insert the key and turn it 1/4 turn clockwise. The lock will
be released and the cap can be opened.
TO CLOSE:
Push the tank cap into position with the key inserted. To
remove the key, turn it counterclockwise to the original
position.
WARNING:
Be sure the cap is properly installed and locked in place
before riding the motorcycle.