{"product_id":"rk-excel-520so-106-520so-steel-o-ring-drive-chain-106-links","title":"RK Excel 520SO-106 520SO Steel O-Ring Drive Chain, 106 Links","description":"RK’s traditional round O-ring chain is a convenient blend of performance and affordability.  SO’s O-ring is constructed from Nitrite Butadiene to seal in lubrication and deliver smooth power with minimal seal ring drag or loss of horsepower. 520SO chains are suitable for low to mid-range CC motorcycles that came from the factory with sealed chains. 520SO can be used for both on street and off-road up to 400ccs. 520SO is available only in natural finish.\n\u003cp\u003eThe RK Excel 520SO-106 is a traditional round O-ring drive chain designed for low- to mid-range motorcycles, ATVs, and off-road vehicles originally equipped with sealed chains. This 520-size chain includes 106 links and uses RK Excel’s natural-finish steel construction for dependable performance in both street and off-road applications. It is rated for engines up to 400cc and applications producing up to 60 horsepower.\u003c\/p\u003e\u003cp\u003eThe RK Excel 520SO chain features nitrile butadiene rubber O-rings that help retain internal lubrication while limiting seal drag and power loss. This design supports smooth power transfer, consistent operation, and improved resistance to contamination compared with non-sealed chain designs. The chain is suitable for street motorcycles, dual-sport models, dirt bikes, and ATVs when the original equipment fitment calls for a 520 sealed chain with compatible link count and specifications.\u003c\/p\u003e\u003cp\u003eWith a tensile strength of 6,900 pounds and a maximum chain width of 0.854 inches, the RK Excel 520SO-106 provides a practical balance of durability, efficiency, and value. A clip-type master link is included for installation. Verify the vehicle manufacturer’s chain size, required link count, clearance, and master-link configuration before installation. The RK Excel brand and manufacturer part number 520SO-106 identify this chain for replacement and fitment reference, while the vendor part number is also 520SO-106.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSize: 520 chain with 106 links\u003c\/li\u003e\n\u003cli\u003eModel: 520SO\u003c\/li\u003e\n\u003cli\u003eBrand: RK Excel\u003c\/li\u003e\n\u003cli\u003eManufacturer Part Number: 520SO-106\u003c\/li\u003e\n\u003cli\u003eVendor Part Number: 520SO-106\u003c\/li\u003e\n\u003cli\u003eConstruction: Steel chain with natural finish\u003c\/li\u003e\n\u003cli\u003eSeal Type: Nitrile butadiene round O-rings\u003c\/li\u003e\n\u003cli\u003eApplication: Low- to mid-range motorcycles, ATVs, and off-road vehicles originally equipped with sealed 520 chains\u003c\/li\u003e\n\u003cli\u003eMaximum Engine Rating: 400cc for street and off-road\/ATV applications\u003c\/li\u003e\n\u003cli\u003eMaximum Horsepower: 60 HP\u003c\/li\u003e\n\u003cli\u003eTensile Strength: 6,900 pounds\u003c\/li\u003e\n\u003cli\u003eMaster Link: Clip type included\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"RK EXCEL","offers":[{"title":"Default Title","offer_id":67558417694955,"sku":"691-1904","price":84.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/6c00-6936f294b2e70_2d005fcd-7637-4fc7-bf86-fc8dedbbb571.png?v=1790761545","url":"https:\/\/ctracingservices.com\/products\/rk-excel-520so-106-520so-steel-o-ring-drive-chain-106-links","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}