Evo550 posted info on his bike a while back. Be worth searching.
He's generally helpful and not one for playing secret squirrel: if I was a betting man, I'd say that he will post the link, or the info regardless..
Do I have a choice now
James, Where to begin??
Front end is a straight bolt on of a YZ 465 forks and triple clamps, I'm pretty sure this would also apply to same years IT's.
Back end is IT 465, don't use a YZ swingarm as they don't match the quick release rear wheel set up of the XT's. XT rear wheel and axle bolt straight up to the IT swingarm but you will need to extend the standard XT brake arm to allow for the longer swingarm (Same with chain.) Plus a few spacers but width is the same and same size s/arm bolt.
YZ 465 H shock was used but had to have a spacer fitted as it sat up to high in the rear, it again was a straight bolt up......and that's where the cheap/easy stuff ends.
The YZ shock remote reservoir creates a few problems, number 1 is where it exits the shock head it hits the underside of the tank and again where the reservoir is mounted on the frame down tube it hits the tank, the solution to this is to modify the standard tank to allow these to fit, I took this opportunity to reshape the standard tank (on the yellow bike) to suit my liking.
The next problem the shock creates is the spring now rubs on the airbox snorkels and constantly tears them off the back of the carbs...not good. Pods fit well, but I'm not a big fan, so I had a alloy airbox made up. Expensive and never quite worked/breathed right.
I modded the rear sub frame to use a YZ seat. Motor was left box stock, solid, reliable, heavy and fun.
The side plates are YZ 125 "J" , guards are US yellow YZ's.
Good solid fun.