Riken – Japanese OEM piston rings for Honda engines

Riken Corporation is a world-renowned Japanese manufacturer specializing in high-precision engine components, best known for its piston rings. Founded in 1917, Riken has over a century of experience and is one of the key OEM suppliers for Honda, Toyota, Nissan, Mazda, and Subaru. At JDMshop.eu, Riken piston rings are the benchmark choice for anyone rebuilding or refreshing a Honda engine with genuine Japanese quality and long-term reliability.

Riken piston rings – precision, sealing, and durability

Riken piston rings are designed to ensure maximum combustion sealing and optimized oil control. Using advanced metallurgy and surface finishing technology, these rings maintain stable compression, minimize friction, and reduce oil consumption. Every Riken set meets international ISO 9001, IATF 16949, and ISO 14001 standards, guaranteeing top-level manufacturing consistency and environmental compliance.

• Compression rings – made from hardened cast iron or alloy steel, often with chrome, molybdenum, or phosphate coatings. They provide a perfect seal between the piston and cylinder wall, maintaining consistent compression under extreme temperature and load conditions.
• Oil control rings – three-piece designs with optimized flexibility and superior oil scraping capability. They help keep oil consumption low and combustion chambers clean for efficient, smooth operation.
• OEM technology – the same piston ring sets are installed on new Honda engines in Japanese factories. Each ring is precision-machined and individually tested for sealing performance, wear, and dimensional accuracy.

Riken is one of Honda’s primary OEM piston ring suppliers, covering engine families such as D-series, B-series, F-series, K-series, R-series, and L-series. Their products are widely used in both OEM assembly and professional engine rebuilds. Thanks to consistent friction properties and superior material stability, Riken rings are trusted by workshops specializing in performance and VTEC engine tuning worldwide.

Why choose Riken piston rings at JDMshop.eu

• Authentic OEM origin – manufactured by the same company that supplies piston rings directly to Honda factories.
• Micrometric precision – perfect cylinder fit, stable compression, and minimal blow-by.
• Advanced materials – chrome-molybdenum and phosphate coatings for enhanced wear resistance and heat stability.
• Made in Japan – all Riken automotive rings are produced in Japan under strict quality control.
• Wide Honda application – compatible with D13, D15, D16, B16, B18, F20, K20, K24, R18, R20, and other popular Honda engines.

Riken represents the highest level of Japanese engine component engineering. By choosing Riken piston rings from JDMshop.eu, you’re investing in genuine OEM precision, long-lasting performance, and the same quality that powers Honda engines straight from the factory.