this one's kinda crazy. when you leave the biker place, jump on a bike and head left. when the roads going both directions join, cross the median and start heading north. eventually you'll come to a T in the road. there is a huge staircase on the right just before the T. jump it. you'll land on the rooftop. they'll be a couple guys up there. once you kill them, you'll be able to drop off the other side of the building. there should be a staircase you can go down. there are lots of guys down here so be careful or quick. the bike is in one of the side garages. once you get on it, head strate out of the garage to the far wall and turn right. you'll see a stack of smashed cars. turn right at the smashed cars and there is a staircase. jump the staircase to escape and hightail it to the biker joint. victory and the spoils are yours.