Get the service manual for your machine.. Some of the machines are set to + toe and some - toe mine was set totally backwards from new and once i corrected it handled like a dream

 

I used the 2003 AC 500 TBX manual and adjusted the toe to 1/4" Toe In each side as the manual stated.
I see some others have increased the front tire pressure. I may try that next. The shocks are adjusted to the lowest
on the rear and second notch on the front. Everything I've done is better but still not right.
I've been looking for a steering stabilizer kit to install but can't find anything for this AC let alone any other similar models of AC.
If anyone out there has found a kit that bolts on I'd be game. The Precision steering damper is $$$$$.
Thanks

 

Steering stabilizer is not going to fix the nose dive issue all that will do is take some of the shock out of the steering when you hit a bump. If the alignment is god then it just comes down to suspension tuning and tire pressure. On my 2014 switched my tires after the first ride they had a fairly stiff sidewall and only ran them about 5 psi. Springs were set to the last notch or second last cant remember. It handled like a dream and could take turns at speed without a issue.. What might be happening when turning is your tire is folding over causing you to dive when it folds over it tends to dig in a bit. Common issue on stock and some other tires out their