You probably just need new sway bar bushings. Check your link pins to make sure they are not worn out just give them a wiggle they should be solid if the ball clanks inside the joint they need to be replaced. Good luck
If you can wait another few weeks I am going to be offering an aftermarket sway bar that helps dramatically with the understeer problem these bikes have. It comes with new bushing and mounts totally changes the way the bike rides and tracks! PM me for more details and to get on the waiting list.