Buying an 04 z400 this week for my son to race mx. I have read just about every post here. The quad has DG nerfs and bumper, Procircuit 4 full exhaust, new timing chain, valves have been re shimmed. Looking for a good set of a-arms and extended axle. Found a few good deals already. Also running the ltr front shocks reconditioned by Derisi and going with a trx450 rear shock. Just and easy set up for this year. Will upgrade to better next year. Looking for a fcr carb and a dyna ds cdi if anyone has these. I do powder coating at home so it will get a nice color combo. Will post before and after pics later!