outlander 400 Steering

Hello, im new here and just picked up an 03 outlander 400 for my wife. Im wondering if there are any known mods to add stability to the steering. She was riding a Polaris before this and was very comfortable on it but she does not feel safe anymore on the outlander. It is really a handfull on rutted and rocky trails, especially on down hill braking. She had bars ripped out of her hands the last ride on a rutted downhill and bars went full lock and it ended up rolling.

Are there any steering stabilizers available for the outlander or "castor mods" to be done. Tips on alignment? Toe in or out a certain amount? Im 35 and been riding since I was eight years old. I can see why it happened to her. I rode it in some rutted and rough trails and you have to be on top of this thing or your bars will be full lock in an instant. My old King quad 750 was like this as well. It ridiculous and I dont know why manufacturers use such steep castor angles. Hopefully I figure something out or you guys know of some tips or tricks for this.