1978 American Motocross - Jim Gianatsis
Jim Gianatsis testing Bob Hannah's 250cc National and Supercrosso Championship winning Yamaha OW26.

Jim Gianatsis testing Bob Hannah's 250cc National and Supercrosso Championship winning Yamaha OW26.

OW26-78 01 EngineLeft

YamahaOW26250cc1978AMA SupervrososAMA outdoor National