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The RK EXCEL 520SO-100 520SO drive chain is a dependable O-ring chain designed for low- to mid-range motorcycles and powersports applications. Supplied by RK, this traditional round O-ring chain combines practical performance with affordability for riders who need smooth, consistent power transfer. Its steel construction and natural finish make it a suitable replacement for motorcycles originally equipped with sealed chains.
The chain uses a nitrile butadiene O-ring design to help retain internal lubrication while limiting seal drag and horsepower loss. The result is smooth operation and reliable chain performance for both street and off-road use. Rated for applications up to 400cc and up to 60 horsepower, the RK EXCEL 520SO-100 is well suited to compatible motorcycles, ATVs, and other powersports vehicles within its recommended operating range. A clip-type master link is included for installation.
Use the RK EXCEL part number 520SO-100 when selecting a replacement chain for a compatible 520-size drivetrain. This model includes 100 links and is available in a natural steel finish. Always verify chain size, link count, vehicle compatibility, and manufacturer recommendations before installation.
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