Originally Posted by Disco Stu
the dry weight is meaningless in the real world, unless you intend to ride your bike with an empty tank and no fluids in the engine and transmission. If you do so, please post videos.
No, it's not meaningless. All bikes require fluids/battery/etc. But some bikes have different fuel capacities, which skews the comparison. So as a metric, dry weight is actually a better tool to measure the weight of the materials used to build the bike
You're right that the wet weight is useful to know, but it's not a good way of measuring lots of different bikes against one another.