Racer X Films: How to Build a Factory Bike January 29, 2018 9:50am | by: Kyle Scott Home Multimedia Video Racer X Films Racer X Films: How to Build a Factory Bike - Supercross Glendale, AZ GlendaleMonster Energy AMA Supercross Championship Time lapse of Matt Winters building Shane McElrath's Troy Lee Designs/Red Bull KTM prior to Glendale Supercross.