12V 55W H9 Headlight Bulb. Commonly fitted to headlights on KTM and Suzuki's - plus others. Sold as singles.
Is this the bulb you need ?
H9 and H11 Bulbs look very similar.
However, if you look more carefully, you will notice that the H9 has a tab at the top of the female side which is not present in the H11 headlight bulb.
Also, the top lugs on each side of the bulb are identical in the H9.
This is not the case in the H11 headlight bulb On the H11 they are asymmetrical and opposite.