I have a 430EXii flash on my 7D used with either an EF 70-200mm f2.8L IS II USM or a 50mm f1.4 USM. I have a shoot to do that will run from late afternoon into the night. I was hoping someone could give me some advice on techniques to shoot motocross (inside a stadium with lighting) that will help me get some nice shots.
Any help will be greatly appreciated

Thanks in advance!