I have an issue at the local track I ride at. At the end there is a large berm corner where I can carry some good speed through. sitting down leg up third gear. Right after the berm ends there is a large dip(almost like a pot hole). When I power through it sitting down the rear falls in and comes right back out. Problem is, when the I hit the dip the rear up the bike comes up pretty harsh and its killing my back. It almost feels like I'm compressing my back when I ride through it, if that makes sense. It feels super harsh. There's really no way to avoid the dip. I have a messed up back and just seems to make it worse.