I have a 99 SX700 with 3,200 miles in great shape runs awesome. I am looking to but a 04 viper with 350 miles for a good price locally. My questions is how much different are these 2 sleds in handling and performance -I will keep the machines stock no pipes only clutching and jetting. Also what is the MPG on the Vipers? I do real good on the gas and oil with my SX --Wqant opinions before I make the move-Thanks!!