OS Giken
Welcome to the OS Giken collection, where passion for performance meets unparalleled craftsmanship. Founded by Masaharu Okazaki in the early 1970s, OS Giken has become synonymous with high-performance Japanese race engines, striving to compete with the finest European offerings. Our Journey Starting in the early 1960s, Masaharu Okazaki embarked on a mission driven by his love for motorsports and a deep understanding of mechanical design. His journey began with: Tinkering with motorcycle parts in his garage. Self-education through disassembly and redesign of components. A focus on strength, durability, and high performance. About OS Giken Officially established in 1973 in Okayama, Japan, OS Giken has earned a reputation as a premier manufacturer of racing drivetrain parts. Our commitment includes: 100% Made in Japan: All OS Giken parts are meticulously manufactured and assembled in Japan. Strict Quality Control: We adhere to rigorous quality-control guidelines throughout the p...
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