If it is the 5W5 sidelight, then you can remove the plastic cover and grip the bulb holder with long nose pliers, just a little wiggle and a gentle twist will loosen the bulbholder from the headlight case, then pull the bulbholder straight out.
If you can find some duck billed long nose pliers, even better. Replacing the bulbholder, you should be able to just push it back in with your fingers.
If you have any teenagers in the house, ask them to remove and replace it as they mostly have long skinny fingers.