You were hanging off the bike a little less in the crash, but I think the main contributor was trying to keep up with the CR. If you watch you two going into turn 6, he goes in with a bit more entry speed (notice the gap between you two get larger before he even apexes), and maintains/builds that speed. You entered 6 at your normal pace, and tried to make up time on the throttle coming out.
You got good speed with an empty track. I would focus less on overall speed, and focus more on maintaining your current pace in traffic. At the 0:20 second mark: Going into turn 3, you saw the group of riders ahead of you. Your entry speed and pace would have allowed you to get around the rider easily, even on the less than ideal line you were on (as he had the line you wanted). You could have made the pass cleanly, but you hesitated and backed off a little. Nothing wrong with that, if you weren't comfortable making the pass then you shouldn't have done it. But if you weren't comfortable passing in 3, you revert back to your Novice group line of thinking for passing. Instead of going your normal pace into Turn 3, you back off a little, let him get ahead some, then go through 3 and pass him coming out of the corner as you both stand the bike up - Allowing you to use the optimal line on track for the quickest speed. Instead, you came out of 3, hesitated again about passing him, then made (What I thought) was a sketch pass right before going into 4. Your "window of opportunity" for passing will only get smaller the faster you go. And the more you hesitate, the smaller you're making that window for yourself.
