Our Trackmaster style frame is built using original TM guidelines but has been revised and ugraded to fit the smaller Triumph 500 twin motors. Additionally we have upgraded the swingarm mounting area and use a needle bearing setup in the swingarm pivot. Available with or without seat\tank combo and a round or rectangular type swingarm. Oil tanks or oil in the frame options are available too. The perfect platform to build the ultimate Dirt Track racer, Sportsman spec Road Racer or a custom Street-Tracker.