{"product_id":"rk-excel-520so-120-520-x-120-link-o-ring-drive-chain","title":"RK Excel 520SO-120 520 x 120-Link O-Ring Drive Chain","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-120 drive chain is a traditional round O-ring chain designed for low- to mid-range motorcycles and all-terrain vehicles. Its 520 size and 120-link configuration provide dependable fitment for vehicles originally equipped with sealed chains. Suitable for both street and off-road use, this chain supports applications up to 400cc and up to 60 horsepower.\u003c\/p\u003e\u003cp\u003eThe RK Excel 520SO uses nitrile butadiene rubber O-rings to help retain internal lubrication while limiting seal drag and power loss. This construction promotes smooth power transfer, consistent operation, and reliable service in everyday riding conditions. The chain is supplied in a natural steel finish and includes a clip-style master link for installation.\u003c\/p\u003e\u003cp\u003eDesigned for motorcycles, ATVs, and similar powersports applications, the RK Excel 520SO-120 offers a practical balance of performance and affordability. Verify the vehicle manufacturer’s original chain size, link count, and sealed-chain specification before installation. The chain is rated for street and off-road\/ATV use up to 400cc.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSize: 520 x 120 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-120\u003c\/li\u003e\n\u003cli\u003eVendor Part Number: 520SO-120\u003c\/li\u003e\n\u003cli\u003eChain Type: Round O-ring drive chain\u003c\/li\u003e\n\u003cli\u003eFitment: Low- to mid-range motorcycles and ATVs originally equipped with sealed chains\u003c\/li\u003e\n\u003cli\u003eApplication: Street and off-road\/ATV use up to 400cc\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\u003cli\u003eFinish: Natural steel\u003c\/li\u003e\n\u003cli\u003eChain Width: Maximum 0.85 inches\u003c\/li\u003e\n\u003cli\u003eWeight: 3.39 pounds\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"RK EXCEL","offers":[{"title":"Default Title","offer_id":67558397575403,"sku":"691-1909","price":94.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/6c00-6936f294b2e70_03dfcc81-978d-4b67-bc0e-9c1bb78a0e4a.png?v=1790761168","url":"https:\/\/ctracingservices.com\/products\/rk-excel-520so-120-520-x-120-link-o-ring-drive-chain","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}