A client and friend of mine is hiring me to do a commercial for his motorcycle team. They will be competing in Daytona this weekend and he wants me to cover a lot of footage for them. I have done a lot of work in controlled environments before but this is the first time I'm doing something of the sort. My main worry is focus. I have never really done focus for things that are moving quite that quickly so I am not sure exactly how I would go about doing so. Does anyone have any advice for this situation?

I am shooting with an XH A1

I'm assuming you'll be shooting outside in bright sunlight (being in Daytona) so I don't think focus will be too much of an issue. Keep your iris tight (~f.8 - close down the iris before switching on nd's to control exposure) and your lens reasonably wide and pretty much everything will be in focus.