Redlion,
My wife has a 2000 SS with about 4500 miles on it now. It has been a great sled. The clutching on hers is stock, she is happy with it so I havent messed with it other than cleaning/lube. I did drop the jetting one size on the Mains, and I dropped the needle one clip on the MAG side only after testing at about 10 degreesF. I also re adjusted the pilot air screw in about 1/4 turn from the factory setting, as I found it was slightly rich. What did this do??, maybe gained a couple MPH, but it runs spot-on now, nice and responsive! I also run Amsoil, so I turned down the oil injection slightly, on a good steady day of riding from 30-65 MPH on hard groomed trails it gets from 15.5-16.5 MPG, and almost 200 miles per quart on oil all with ZERO problems, and I have run it from -10 degreesF to 40 degreesF. This sled was jetted very safely to -20degrees from the factory. I have no info on pipes, or clutching, although I have heard that these and Indy 500's respond well to fresh factory springs and a 40-36 multi angle helix, it helps with acceleration instead of that spot at 30-40 mph where it doesnt feel like it is pulling at all. I may try one next season.