I just purchased a 1981 Suzuki GN400X. It only had 3600 miles on it. It´s almost like new. The only problem is starting it. I´m to old to kick on a 400 single. I think the reason I got it was because the previous owner didn´t know about the pressure release valve. Trying to start the bike without it was almost impossible. It really runs very well for a 400 single. I live in the mountains about 25 miles from town and it´ll purr at highway speeds up the mountain. It´s light and thumps away.