I can't complete the last race on the babylon story line, does anyone have..

What I do, and this works quite well, is let some other racers get in front of you and ride their turbulence until you it the first jump. When your going up the ramp, charge up and do alot of tricks while in the air to increase your speed when you land, then boost and you should catch up to the guardian. When you hit the lamp that he's floating out of, the scene changes and your actually able to complete a lap, then you just do that two more times and you'll complete it. It doesn't matter what position you come in, i've come in second and first. Good luck. Hope this helps.