EK Chains in competitive events, or on motorcycles that have been modified. No one knows ... all, we invented the O-ring chain for motorcycles way back in 1974. Since then, weve ... innovator, in 1974 Enuma introduced the worlds first sealed O-ring chain, a design ... became the standard throughout the motorcycle industry, and led to todays high-tech ... durability while reducing friction. But motorcycle chains are only part of the story. ... chains can be found throughout the world in a variety of applications, including ... environments. Among Enumas major customers are Kawasaki, Kubota (construction ...