{"product_id":"rk-420-mru-black-sealed-chain-130-links-part-number-bl420mru-130","title":"RK 420 MRU Black Sealed Chain, 130 Links, Part Number BL420MRU-130","description":"420 MRU - Chain - 130 Links - Black\n\u003cp\u003eThe RK 420 MRU chain is a lightweight, low-friction drive chain designed for select small-displacement motorcycles, including the Honda Monkey and Honda Grom. With 130 links and a black finish, this sealed 420-pitch chain provides dependable performance for street riding and everyday use. The chain is manufactured by RK and identified by manufacturer and vendor part number BL420MRU-130.\u003c\/p\u003e\u003cp\u003eRK MRU chains use proprietary Ultra Thin Seal U-Rings that are less than half the thickness of common O-ring seals. This design helps reduce friction while retaining effective lubrication and contamination protection at the chain joints. Compared with comparable non-sealed 420 chains, the MRU design is engineered to provide up to four times longer chain life and require fewer chain adjustments when properly installed, lubricated, and maintained.\u003c\/p\u003e\u003cp\u003eBefore installation, verify compatibility with the motorcycle’s year, model, sprocket configuration, and required chain length. This RK 420 MRU chain is suited for applications requiring a 420-pitch sealed chain and is a practical replacement option for compatible Honda Monkey and Honda Grom models. Proper alignment, adjustment, lubrication, and routine inspection are essential for maximizing service life and maintaining smooth power transfer.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBrand: RK\u003c\/li\u003e\n\u003cli\u003eModel: 420 MRU\u003c\/li\u003e\n\u003cli\u003eManufacturer and vendor part number: BL420MRU-130\u003c\/li\u003e\n\u003cli\u003eChain size: 420 pitch\u003c\/li\u003e\n\u003cli\u003eLink count: 130 links\u003c\/li\u003e\n\u003cli\u003eSeal design: Proprietary Ultra Thin Seal U-Rings\u003c\/li\u003e\n\u003cli\u003ePerformance: Engineered for up to four times longer chain life than comparable non-sealed 420 chains\u003c\/li\u003e\n\u003cli\u003eMaintenance: Designed to require fewer chain adjustments than comparable non-sealed 420 chains\u003c\/li\u003e\n\u003cli\u003eConstruction: Lightweight, low-friction, sealed chain\u003c\/li\u003e\n\u003cli\u003eFitment: Select Honda Monkey and Honda Grom applications; verify year, model, and sprocket configuration before installation\u003c\/li\u003e\n\u003cli\u003eFinish: Black\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"RK","offers":[{"title":"Default Title","offer_id":67549041983723,"sku":"12210426","price":173.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/2733243.png?v=1790686916","url":"https:\/\/ctracingservices.com\/products\/rk-420-mru-black-sealed-chain-130-links-part-number-bl420mru-130","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}