1978 American Motocross - Jim Gianatsis
Bob Hannah Team Yamaha 1978 AMA Supercross Series

Bob Hannah Team Yamaha 1978 AMA Supercross Series

Bob Hannah / Yamaha YZ 250-78 OW26 1978 Supercross. Photo ©Jim Gianatsis

Bob Hannah Team Yamaha Motocross USA 1978 AMA Supercross Series