But the reality is that the DR-Z is anything but impractical. Despite its relatively small 398cc engine, the SM is a very entertaining motorcycle, whether you are commuting in an urban environment or heading out into the twisties on the weekend. About the only place that the 400 feels out of place is on freeways, especially if the trip is longer than 10 or 15 minutes. When Southern California freeway traffic actually flows, it does so at about 75 mph, which is about where the Suzuki starts letting you know you're approaching its maximum velocity. Pushing it to 85 for any length of time almost feels abusive.