Allies
Like an international organization, a lot of biker gangs, namely the largest ones, have a network that spans the entire globe. This comes in handy whenever they have an issue overseas and need a local to help them out. This could be anything from translation, transportation, or dealing anywhere in the world.
The largest gangs have really expanded to all of the continents on this planet and have franchises all over the place. Just when you thought that biker gangs were dying out, they are going stronger than ever and have built a global community that makes them even more of a force to be reckoned with.