OK, so I use STANDARD in camera settings. Thanks for the clarification. I set the flash to Highspeed sync, I think it's called. The flash during the day is use as a fill since most of the time they are hunched over the bike and their faces are usually pretty dark. It doesn't bother the rider and those guys are so keyed in I think the only thing that would distract them is if I stepped in front of the guys and knocked them off the bike.
I use no difussion on the flash either.
1. full wheel visable 
exposure: 1/6400
F/2.8
AV
IS0 400
lens 70-200 shot at 70mm
 | MIME changed to 'text/html' | Content warning: script |
2. This one is a little soft but I like it anyway
| MIME changed to 'text/html' | Content warning: script |
3.
1/1000
f8
AV
400
| MIME changed to 'text/html' | Content warning: script |
4.
1/250
f8
av
400
| MIME changed to 'text/html' | Content warning: script |
5. This was a great corner but as the race went on the guys were really hitting it tight and it became a bit too hairy and I moved in for safety reasons.
| MIME changed to 'text/html' | Content warning: script |
6. Tried a landscape shot, not sure it works
| MIME changed to 'text/html' | Content warning: script |
