Motorcycle racing shooting tips?

TristanP

I'm taking my daughter to my brother's race this Sunday at Summit Point Raceway and hope to get some good pics of him with my 70-300 IS. It's probably going to be cloudy (says the Weather Channel). What settings am I shooting for to get wheelspin but sharpness while panning? In general, what are the best parts of the track - corner approach, mid-corner, or on the way out? This will be my first try using the Mode 2 IS on this lens. TIA.