Hi, I'm kinda new here. But, are your settings stock? If not, then I'd return them to stock first of all. Then start increasing your rebound damping - one click at a time. Go over the same turn with that bump and feel it out.
So, if you feel a wallowing in the front end make adjustment to the front end. If the instability makes you feel like you have to muscle the bike through the bump then make the adjustment to the rear shock.
Does that make sense to you?
victor
BTW, your description sounds more like low speed damping than high speed damping. I have a Penske shock with lo/high compression damping and rebound damping adjusters. Personally, I've only found the need to play with the lo/high adjuster when I have rear end chatter on braking.
