Ive got an 06 drz400 which I brought new and have so far done 3500km on it trouble free, I ride it to work nearly everyday and take it offride as often as I can and it has not let me down. I go riding with a couple of mates 1 has an xr650 and another has a gasgas 400,in a straight line drag I can beat the gasgas and can keep up with the xr650.The drz doesnt need constant maintanence like the yz/wr or crf just regular oil changes for peace of mind about my only complaint I have is the suspension is a bit soft for offroad so this will be something ill be looking at shortly, apart from that I cant really fault it