Just added a cherry 2003 KLX400SR (DRZ400S) to the stable. It's purpose is to become a commuter bike for me in a distant city where I fly to and work every month. It will serve that need well, after tweaks, most importantly gearing way up to overcome the big handicap of a 5 speed narrow-spread gear box.

While here at the shop for setup, I was running it out to the gravel pit to play on. I got curious about the all-around flexibility of the 400 as compared to my KLX250S turned 330. After some experimentation, there's no question that the smaller KLX inspires significantly more offroad confidence. Better front wheel tracking, lower motor inertia lower bike mass, the less over-square 250 bottom end is just more practical. The 400's front end is also a bit odd, liking to hop off line if you prang things. They're harsh. Could use Gold Valves for sure.

With gearing tricks I can make both bikes do distance riding, but the 400 is definitely better for that. It'll back track the same 1,300 miles between Oklahoma and Michigan as the KLX250S made when it was brought home in 2008. At least this trip I'll be able to sit up going WFO without the speed dropping way due to wind resistance and the smallish 250 motor.

Question answered. The KLX330S will stay right here and remain my overall regional dualsport and occassional offroad bike.

 

I also own a DRZ, and a KLX250s. My DRZ thus far has been the best 50/50 DS bike I have ever owned (and that's a pretty long list). I have been places on it I never thought I wanted to go, and with an IMS tank I have the range to get me back. It does have it's short comings (5 Spd?!? Come on Suzuki) But makes up for them in other areas.
If I could get low 30hp and 200+ mile range on the KLX.... The DRZ would be tough to keep around.