RK Chain 520SO84 520 Series 84-Link O-Ring Motorcycle Drive Chain

The RK Chain 520SO84 is an 84-link, 520-series standard O-ring motorcycle drive chain designed for street and off-road use on bikes up to 400cc. Blending affordability with reliable performance, the SO series is an excellent choice for riders needing a factory-sealed replacement chain without stepping up to a premium X-ring design.

Key Features:

• 520 Series, 84 Links — Direct replacement sizing for a wide range of mid-displacement motorcycles
• O-Ring Sealed — Conventional round O-ring design locks in grease to extend chain life and reduce maintenance intervals
• Nitrile Butadiene O-Rings — Advanced NBR compound delivers smooth power transfer with minimal seal drag and no measurable horsepower loss
• Heat-Treated Hi-Carbon Alloy Steel — Components are heat treated for strength and durability; features seamless rollers and shouldered bushings
• 7,700 lb/ft Tensile Strength — Rated for street and off-road applications up to 400cc
• Wear Life Index: 600 — Superior wear resistance compared to non-sealed chains
• Clip-Style Master Link Included — Matching connecting link included for straightforward installation
• Natural (Un-Plated) Finish — Clean, corrosion-resistant appearance
• Pin length: 19.9mm | Pin-to-pin center: 15.875mm | Links per foot: 19.2
• Weight per 100 links: 4.08 lbs

RK has been manufacturing motorcycle chains since 1953 and serves as an OEM supplier to Honda, Suzuki, Yamaha, Kawasaki, and Triumph. The 520SO series is produced at RK's Japanese factory, ensuring consistent quality and dimensional accuracy for both street and off-road riding applications.