There are several biker gangs that wear a skeleton bandana, but the Hell's Angels & the Outcast biker gangs are two that wear the skull bandana.
Bloods main bandanas are red or green
A Mexican one
Association Ñeta which is a Puerto Rican gang wears a white bandana
I highly doubt that he actually is, but the patch he wears in some episodes is representing Hooligans MC of Los Angeles.
One of the largest Biker gangs in the world is the Hells Angels, they have many chapters in Canada. Next to the Hells Angels biker gang, the largest would probably be the Outcast Biker gang, which also has chapters in Canada.
guns knifes bandanas
Bandidos
If You Wear A Pink Bandana Does That Represent A Gang Symbol ?
un motard!
Hells angles
Jackals MC
the pagans