Nooooo! No modern kit on that!
Needs some SRAM Betsy.
Nah, just stick with the XT/XTR that’s on it. By 2000, XT and XTR kit (9spd by this point) was highly capable stuff, and not a huge amount has moved on since tbh. Until last year, I was riding M952 XTR shifters and mechs on both my bikes and it was great!
Those CODA cranks were quite flexy iirc. Worth replacing with something stiffer if you actually plan on riding it much, but if not then just keep em on for retro coolness.
The CODA brakes weren’t that good for disc brakes even back then. Definitely replace with something better IMO.
Those Lefty DLR100’s actually worked really well once they’d bedded in properly, problem was they could take forever to bed in. Also slightly susceptible to water ingress making them feel gritty in use, but solved by packing the bearing surfaces full of grease iirc.
Surprised by the full CODA hubs and rims on that bike. Not all that good to be honest. Definitely worth upgrading with something better if you’re going to ride the bike much. Plenty of aftermarket lefty hubs available now so not difficult to sort some decent wheels out, though I’d go all black and low key still myself keeping the bike looking as original as possible.
As for contact points, well the bars will be 25.4 no doubt, and you’ll struggle to find many decent bars in that size these days. Besides the Easton EA70’s it came with were actually very good bars anyway, and probably 685mm wide. I’d whip that suspension post off and put a Thomson on myself, and a saddle that suited my arse.
It’s odd just how capable some “retro” bikes still are today when upgraded only slightly (in this case, new brakes will be the biggest difference), and how much other bikes have dated. Most other race style hardtails of the time would have had 63mm SID’s on and V brakes and very little mud clearance, whereas Cannondales always had decent mud clearance and that 100mm fork which was long travel for the time means its still fairly contemporary even now.