You answer disguised as a question hits the nail on the head here. That is a very bumpy, fast section at Jennings, and one of the most important corners on the track. This turn (13), requires that you settle the bike early to set yourself up to get out of 14 and launch yourself down the front straight. Why does he feel the need to trailbrake here??? Turn 8 is another area where you see a lot of lowsides because it is slightly off camber and people rush up and carry large amounts of brake into the corner. Result; lowside... This is more of a rider issue than a setup issue.
Matt