The XS400 has a new selling point: IDIOT RESISTANT. Here's the story: So had somebody come by today to look at the bike. It was going well, and then his UNCLE SHOWED UP... It's 19 degrees out, the 400cc engine is small and cold blooded, and this motorcycle guru tries to get on the throttle immediately after the bike starts. Overwhelms the engine, and it dies. Of course. He tries this three times. Then he steps back, shakes his head and says: "Something's wrong with the engine." Okay Sparky, let me tell you what's wrong with the "engine." You we're pawing at the throttle of an air-cooled parallel twin on a cold night, like it was a prom date. They leave. I come back outside, check to make sure Johnny Grabass hadn't screwed anything up too much, fire the bike up, and after a minute of warming up, she comes to life. Revs fine, no unusual rattles, clanks, vibrations, etc. Revs up fine, pops a bit like normal, etc etc etc. Something wrong with the engine indeed.