HL500 Aberg replica, 1977 Yamaha TT500 motor Serial number 1T1-0033XX, 1978 period Pro-Fab frame. Complete restoration. Zero time. White Brothers high compression piston & WB2 cam. 36mm Mikuni Carb, Simmons forks Fox Air shocks. double leading front brake, Gold SUN rims, stainless spokes, (21-17) NEW: Bridgestone tires, NOS yamaha seat cover, cables. Twin Air filter. My best information is Pro-Fab built 20 1977 style and 50 1978 style frames so this would be one of 50. Please contact me with any question or to request more pictures.