There are many accessories for bicycles and motorcycles. Helmets, lights, special clothing, and etc… One very important thing you should have for your bike or motorcycle is a good padlock or combination lock.
Thousands of bikes and motorcycles are stolen each year, and it doesn’t matter where you live. Bicycles are particularly easy to steal, because they are lightweight and easy to carry. I have heard of incidents where a thief drove by in a car and popped his trunk and stole a bicycle unattended and unsecured and drove off. It would have been harder for the thief to steal the bicycle if it was secured by purchasing a wholesale padlock 
or combination lock.