{"product_id":"rk-excel-420mxz-126-mxz-mini-racing-drive-chain-420-x-126-links","title":"RK Excel 420MXZ-126 MXZ Mini Racing Drive Chain, 420 x 126 Links","description":"Heavy duty MXZ Mini Racing chains made for mini MX and SX racing. MXZ chains feature Chromoly steel construction with seamless rollers and bushings, and oversized special alloy pins for added strength.\n\u003cp\u003eThe RK Excel 420MXZ-126 MXZ Mini Racing Drive Chain is a heavy-duty chain engineered for mini motocross and supercross racing applications. Designed for off-road motorcycles using a 420 chain size, this 126-link drive chain provides dependable power transfer and durability for demanding race conditions. Its compact design is suited to mini MX and SX bikes with engines up to 150cc and output up to 30 horsepower.\u003c\/p\u003e\u003cp\u003eConstructed from high-strength Chromoly steel, the RK Excel MXZ chain features seamless rollers and bushings for consistent operation and improved wear resistance. Oversized special-alloy pins add strength where the chain experiences significant loading, helping support reliable performance during acceleration, jumps, and repeated race use. The chain is supplied with a clip-type master link for installation and service convenience.\u003c\/p\u003e\u003cp\u003eVerify motorcycle fitment, chain size, link count, and required chain width before installation. The RK Excel 420MXZ-126 is intended for compatible mini off-road racing motorcycles and should be installed and maintained according to the motorcycle and chain manufacturer recommendations. Regular inspection, lubrication, and proper adjustment can help maximize chain life and drivetrain performance.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSize: 420 chain size with 126 links\u003c\/li\u003e\n\u003cli\u003eModel: MXZ Mini Racing\u003c\/li\u003e\n\u003cli\u003eBrand: RK Excel\u003c\/li\u003e\n\u003cli\u003eManufacturer Part Number: 420MXZ-126\u003c\/li\u003e\n\u003cli\u003eVendor Part Number: 691-10001\u003c\/li\u003e\n\u003cli\u003eApplication: Mini motocross and supercross racing motorcycles\u003c\/li\u003e\n\u003cli\u003eConstruction: High-strength Chromoly steel with seamless rollers and bushings\u003c\/li\u003e\n\u003cli\u003ePin Design: Oversized special-alloy pins for added strength\u003c\/li\u003e\n\u003cli\u003eTensile Strength: 4,980 pounds\u003c\/li\u003e\n\u003cli\u003eMaximum Engine Rating: Up to 150cc for off-road applications\u003c\/li\u003e\n\u003cli\u003eMaximum Output Rating: Up to 30 horsepower\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":67558440370411,"sku":"691-10001","price":48.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/ca5a-6936f712bf842.png?v=1790762309","url":"https:\/\/ctracingservices.com\/products\/rk-excel-420mxz-126-mxz-mini-racing-drive-chain-420-x-126-links","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}