RK Japan
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RK Japan RK BL420MRU U-ringchain Black&Gold +CL (Connect.link)
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The product is temporarily out of stock. Approximately 5 - 30 days from the order, at the earliest 15.11.2026.
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Product description
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The product is temporarily out of stock. Approximately 5 - 30 days from the order, at the earliest 15.11.2026.
Detailed availability
Notify me when this product is in stock again
Product description
RK 420MRU and 428MRU2 chains are designed to be the Premium Replacement for OE Non-sealed Chain, featuring RK`s only technology of Ultra-Thin Seal, U Ring, make possible to design a Sealed Chain with the width of a Non-Sealed Chain.
RK 420MRU and 428MRU2 are an long lasting solution for daily business use vehicle or commute motorcycle.
RK 520MRU is the Lightest Multipurpose Sealed Chain specially designed for ~450cc, applicable to both Street Usage, securing 15,000[km] of chain life, and Track Usage, featuring high performance for the best lap time.
RK 520MRU features RK’s only technology of Ultra-Thin Seal, UW-Rings, minimizing the chain weight and friction loss possible.
Also, by narrowing the application from 125cc~450cc, each chain components are shaped up to its limit, making RK 520MRU as light as 13.8g/link, 10% lighter compare to RK 520XSO.
Converting Non-Sealed to a Sealed Chain result at least 4 times chain life and minimum chain adjustment after initial stretch, while ensuring high efficient horsepower transmission from the engine to the rear wheel throughout the chain life.
RK 420MRU and 428MRU2 are an long lasting solution for daily business use vehicle or commute motorcycle.
RK 520MRU is the Lightest Multipurpose Sealed Chain specially designed for ~450cc, applicable to both Street Usage, securing 15,000[km] of chain life, and Track Usage, featuring high performance for the best lap time.
RK 520MRU features RK’s only technology of Ultra-Thin Seal, UW-Rings, minimizing the chain weight and friction loss possible.
Also, by narrowing the application from 125cc~450cc, each chain components are shaped up to its limit, making RK 520MRU as light as 13.8g/link, 10% lighter compare to RK 520XSO.
Converting Non-Sealed to a Sealed Chain result at least 4 times chain life and minimum chain adjustment after initial stretch, while ensuring high efficient horsepower transmission from the engine to the rear wheel throughout the chain life.
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