Yamaha 500 SR ‘Dirt Track’ May 14, 2014 A Yamaha infused with the spirit of the legendary dirt tracker, the Harley Davidson XR 750.Photos: Thomas Caplain Inspired by the famous dirt tracker Harley Davidson XR 750. - Custom made dashboard connected to simplify electric wiring.- Thermic tape wrapped exhaust pipe. Custom made seat. - Custom made dirt track dress-up kit.- Hand made headlight fully integrated into the number plate. Dunlop K180 front and rear tires.