{"product_id":"rk-excel-bl420mru-130-mru-black-420-x-130-drive-chain-by-rk-excel","title":"RK EXCEL BL420MRU-130 MRU Black 420 x 130 Drive Chain by RK Excel","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 Black 420 x 130 Drive Chain is engineered for riders who want sealed-chain durability without the added weight commonly associated with sealed designs. Supplied by RK Excel, this motorcycle drive chain uses RK’s proprietary Ultra Thin Seal, or U-Ring, technology. With a seal thickness less than half that of many conventional O-ring seals, the chain delivers the lightweight feel of a non-sealed chain while providing improved protection against contaminants and lubricant loss.\u003c\/p\u003e\u003cp\u003eDesigned for dependable street and off-road performance, the RK EXCEL MRU chain offers up to four times the service life of comparable non-sealed 420 chains. Its sealed construction also helps reduce the frequency of chain adjustments, supporting consistent power transfer and easier maintenance. The black finish provides a clean, performance-focused appearance for compatible motorcycle applications.\u003c\/p\u003e\u003cp\u003eWith a tensile strength of 4,540 pounds, the BL420MRU-130 is rated for applications up to 150cc on both street and off-road motorcycles and supports engines producing up to 25 horsepower. The chain includes a clip-type master link for installation. Verify your motorcycle’s chain size, length, and application requirements before ordering.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eRK Excel Ultra Thin Seal U-Ring technology for sealed-chain protection with reduced weight\u003c\/li\u003e\n\u003cli\u003eUp to four times longer chain life than comparable non-sealed 420 chains\u003c\/li\u003e\n\u003cli\u003eRequires fewer chain adjustments than comparable non-sealed 420 chains\u003c\/li\u003e\n\u003cli\u003eTensile Strength: 4,540 pounds\u003c\/li\u003e\n\u003cli\u003eMaximum Engine Displacement: 150cc street and 150cc off-road\u003c\/li\u003e\n\u003cli\u003eMaximum Horsepower: 25 HP\u003c\/li\u003e\n\u003cli\u003eChain Weight: 1.74 pounds\u003c\/li\u003e\n\u003cli\u003eMaximum Chain Width: 0.67 inches\u003c\/li\u003e\n\u003cli\u003eClip-type master link included\u003c\/li\u003e\n\u003c\/ul\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"RK EXCEL","offers":[{"title":"Default Title","offer_id":67738458128569,"sku":"691-1802BK","price":210.95,"currency_code":"USD","in_stock":false}],"url":"https:\/\/www.thespeedshopusa.com\/products\/rk-excel-bl420mru-130-mru-black-420-x-130-drive-chain-by-rk-excel","provider":"THE SPEED SHOP USA","version":"1.0","type":"link"}