But Henry would battle back again. Henry would race the production version of the prototype four-stroke, the YZ400F, for 1998. This is the machine that started the four-stroke revolution in motocross. He battled through a strong but unspectacular supercross season where he finished 7th overall. The outdoor season would be Henry's chance to show the bike's true capabilities. After a win at his home track of Southwick, Henry followed up with a triumphant win in Budds Creek, the track where he broke his arms and back. He would go on to defeat Jeff Emig, Jeremy McGrath, Ezra Lusk, Kevin Windham, Mickael Pichon, and Greg Albertyn, earning five overall wins in one of the most competitive seasons ever to take the 1998 250cc National Championship at Broome Tioga Sports Center. He accomplished this with one whole round left. Having accomplished all his goals, Henry scaled back to a partial schedule for 1999, where he dabbled in snocross for the winter. He returned to the nationals in a farewell tour wearing his #1 plate. He started slowly after taking the winter off, but still managed to score overall wins by mid-season. Henry had been a regular on the AMA Supermoto tour, winning many National events. He gained national attention once again by winning the gold medal in the 2005 X-Games Supermoto race. Henry also won a 2005 Grand National Cross Country enduro race in his first attempt on a stock Honda 450. He followed that with a bronze in 2006. Henry broke his back on March 4, 2007, in a Supermoto race. He now suffers partial paralysis from the waist down, and is working very hard toward yet another recovery. Henry was filmed on September 14, 2009 riding a custom YZ450F and a custom FX Nytro during winter. Henry raced at Winter X-Games 14, in the "Adaptive Snowmobile" class. He took third place.