Undo the upper and lower bolts securing the front section of the air cleaner housing to main section of the housing
Remove the bolts (upper 3 shown, with 3 hidden below)
Separate the halves of the air cleaner assembly. Take out the filter element
Lift out the air filter element
Remove any debris that may have collected inside the air cleaner and wipe the inner surfaces clean.
Fit a new air filter element in position, ensuring that the edges are securely seated.
Refitting is a reversal of removal.