These sound like things I enjoy.

I'm thinking of throwing up a colourful motorcycle gang and some of the significant members.

They'd do the normal set of drugs, theft, prostitution, racketeering etc. that most gamgs would, but with the real focus on underground street races. Their preferred territories to protect would be dramatic jumps, sharp bends or open straights to weave into circuits.

So far, I'm thinking of having an animal theme, most members having tattoos but some of the more hardcore members going in for surgery, cybernetics or genetic tailoring to match the emblem.

Not sure which animal though. Maybe tigers, or snakes.