Image The 51Fifty Energy crew zip-tied a battery to Hayden Mellross' subframe, so they could power their data logger during practice. Credit GuyB Related: Monster Energy Supercross Vital MX Pit Bits Hayden Mellross Salt Lake City Supercross 2017 Use keyboard arrow keys to browse the gallery. Swipe to browse the gallery. Prev Next 8 of 47Autoplay Autoplay SlowMedFast Share to Facebook Facebook Facebook Share to Twitter Twitter Twitter GuyB 4/22/2017 5:35pm Share to Facebook Facebook Facebook Share to Twitter Twitter Twitter