{"product_id":"rk-excel-bl420mru-130-mru-drive-chain-black-420-x-130-links","title":"RK Excel BL420MRU-130 MRU Drive Chain, Black, 420 x 130 Links","description":"MRU features RK’s proprietary Ultra Thin Seal, U-Rings, where the thickness of the seal is less than 50% of the most common O-ring seal. This allows RK to design a Sealed Chain with the weight of a Non-Sealed Chain. MRU will feature 4 times longer chain life than comparable non-sealed 420 chains and will require less chain adjustments compared to non-sealed 420 chains.\n\u003cp\u003eThe RK Excel BL420MRU-130 MRU Drive Chain is a lightweight, sealed motorcycle chain designed for street and off-road applications up to 150cc. Built with RK’s proprietary Ultra Thin Seal (U-Ring) technology, this 420 chain combines the reduced weight of a non-sealed chain with the added durability and protection of a sealed design. The thin seal profile helps minimize friction while retaining lubricant and blocking contaminants.\u003c\/p\u003e\u003cp\u003eEngineered for dependable performance, the MRU chain is rated for motorcycles producing up to 25 horsepower and delivers approximately four times the service life of comparable non-sealed 420 chains. Its sealed construction also helps reduce the frequency of chain adjustments, making it a practical replacement for riders seeking consistent drivetrain performance and lower maintenance requirements.\u003c\/p\u003e\u003cp\u003eThis black RK Excel drive chain measures 420 size and includes 130 links with a clip-style master link for installation. It is suitable for compatible street motorcycles, dual-sport models, and off-road motorcycles within the stated capacity ratings. Verify the motorcycle manufacturer’s fitment requirements, sprocket compatibility, and required chain length before installation. The manufacturer part number is BL420MRU-130, and the vendor part number is 691-1802BK.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSize: 420 drive chain with 130 links\u003c\/li\u003e\n\u003cli\u003eModel: MRU sealed motorcycle chain\u003c\/li\u003e\n\u003cli\u003eBrand: RK Excel\u003c\/li\u003e\n\u003cli\u003eManufacturer Part Number: BL420MRU-130\u003c\/li\u003e\n\u003cli\u003eVendor Part Number: 691-1802BK\u003c\/li\u003e\n\u003cli\u003eConstruction: RK Ultra Thin Seal U-Ring design\u003c\/li\u003e\n\u003cli\u003eFitment: Compatible street and off-road motorcycles rated up to 150cc when matched to the correct sprockets and chain length\u003c\/li\u003e\n\u003cli\u003ePerformance: Rated for engines producing up to 25 horsepower\u003c\/li\u003e\n\u003cli\u003eDurability: Designed to provide approximately four times the service life of comparable non-sealed 420 chains\u003c\/li\u003e\n\u003cli\u003eMaintenance: Sealed design helps reduce chain adjustments compared with non-sealed 420 chains\u003c\/li\u003e\n\u003cli\u003eTensile Strength: 4,540 pounds\u003c\/li\u003e\n\u003cli\u003eMaster Link: Clip-style master link included\u003c\/li\u003e\n\u003cli\u003eColor: Black\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"RK EXCEL","offers":[{"title":"Default Title","offer_id":67558319227115,"sku":"691-1802BK","price":158.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/2655-6936f265aae80.png?v=1790758615","url":"https:\/\/ctracingservices.com\/products\/rk-excel-bl420mru-130-mru-drive-chain-black-420-x-130-links","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}