is there any thing wrong with the 400's? i heard the frame was weak on the 03's? is there anything else? and also what do you like about your 400's
Now im curios, why do you want to know about 400's?
Any who, the 03's have weak frames, but i havent had ANY problems with mines, 04 is perfect it think, 05- 06 has clutch cover problems.
I LOVE my z, I think it will last me a very long time before i upgrade.