My DRZ is the first dual-purpose bike that I have ever had, so I have a newbie question regarding the drive chain... Is it normal for the chain to flail up and down when riding? I have never noticed this on any street bike that I have had before, but street bikes have cush drives, so maybe you just don't feel it. I have a new chain on my DRZ (a 520 sealed ring type), and I have adjusted it loosely at first, then at a little less than a half-inch of play at max length, which I thought was tight enough. When tighter, the frequency of the undulation just rises. I can feel it wiggle and I can see it undulating by looking at my shadow while riding... It will stop undulating under acceleration or when completely off throttle, but when cruising at lower speeds, up and down it goes. It has to be sapping power for roll on throttle. So, did I buy a pud chain, do I need to tighten it more, or is this just the price for having long travel suspension? My FZ1 has a longer chain than my DRZ, but it is smooth-running and I have never had a chain bounce around like that on it or any other street bike.