I have 43MM forks from an '82 490 on my YZ465 fitted with Race Tech Emulators/springs and bushings. Huge improvement over the stock stuff. They (R-T) make a shock for the YZ line so I imagine if that kinda $$$ is in the budget they'll fix up yer IT too.
If you're going to be crazy,you have to get paid for it or you'll get locked up.
Hunter S. Thompson