This Week in Motocross Action, episode 185, presented by O'Neal, is all about Marvin Musquin and the KTM 125SX two-stroke he built with help from KTM and David Vuillemin. MXA had Glen Helen all to themselves, and they were prepping the track with some perfect dozer berms, great for going wide open on this fuel-injected 125 two-stroke.