I called JD just for fun.. they suggested routing my float bowl overflow tube up and over the carb, just to make any gas travel uphill before it can escape. Maybe I need to create a little back pressure there and gas is escaping out the tube that I just don't know about. the other suggestions was pull the carb and lower the floats, even if they measured in spec, make them lower. But in their opinion, there's nothing in their jetting that would account for such an increase in gas consumption.
99 uzj100, gx470
05 525EXC, 01 XT225, 07 TTR90, 07 CRF50