I had a 2000 426 with all the goodies White BROS TI. pipe c/f silencer all the skid plates were c/f, I changed all the bolts to TI, it had a c/f airbox custom TI sub frame, Emig triple clamps in black, black Excel rims with gold Talon hubs had the yellow plastic with Bob Hanna graf. kit gripper seat cover, after market cams, a ton of carb work from Pro Tech, suspension done by Stone Works, Race Tech springs, Gold valves in the forks, billet levers with clutch adjustment and hot start, Gold chain, I could go on and on.
I love that bike, it was like having a auto trans for a bike it would pull for day's, way nicer than my 250 2 stroke that I had, but hell on tires.
A word of advice though if you do anything to your bike the first thing should be suspension work have it set up for your weight and riding style. That one mod will make it easier and more comfortable to ride play riding, and way more stable, and predictable for racing. I promise you will be much faster with the proper suspension under you.
Most people want to go buy there pipes first when 99% of them never really use the power in the stock system.
Have fun with your new toy