{"product_id":"yoxufa-40t-420-chain-mini-bike-go-kart-rear-sprocket-40mm-bore-80mm-4-bolt-bcd-durable-420-pitch","title":"YOXUFA 40T 420-Chain Mini Bike \u0026 Go-Kart Rear Sprocket — 40mm Bore, 80mm 4-Bolt BCD, Durable 420 Pitch","description":"\u003cp\u003e\u003cstrong\u003eYOXUFA 40-tooth 420-chain sprocket with a 40mm center bore and 4-bolt 80mm bolt circle is a direct-replacement rear sprocket for many mini bikes and 196–212cc go-kart engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis heavy-duty sprocket is engineered to fit 420 pitch chains and several popular mini-bike and go-kart models, providing reliable power transfer and improved drivetrain longevity. It's cast and machined to the dimensions most commonly needed for Coleman, Baja, Massimo, TrailMaster, Axis and Predator-based machines. Before installing, confirm the 4-bolt mounting pattern and 40mm center bore match your hub to ensure compatibility.\u003c\/p\u003e\n\n\u003ch3\u003eWill this sprocket fit my Coleman BT200X or CT200U?\u003c\/h3\u003e\n\u003cp\u003eYes, the YOXUFA sprocket is made to match the bolt pattern and bore used on many Coleman BT200X and CT200U variants, but it is not compatible with all Coleman models. Double-check your bike’s bolt circle diameter and center hole size before ordering.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBolt hole circle (BCD): 80 mm \/ 3-3\/16\" center-to-center\u003c\/li\u003e\n  \u003cli\u003eCenter bore diameter: 40 mm \/ 1-9\/16\"\u003c\/li\u003e\n  \u003cli\u003eTooth count: 40 teeth, 420 chain pitch\u003c\/li\u003e\n  \u003cli\u003eNot compatible with B200R, RT200 or B212 models\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this sprocket handle wear and chain retention?\u003c\/h3\u003e\n\u003cp\u003eThe sprocket is manufactured from wear-resistant material and profiled for the 420 chain pitch, reducing the chance of chain derailment and extending component life under normal use. Proper installation and routine chain maintenance will further decrease premature wear.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e420-pitch tooth profile matched to standard 420 chains\u003c\/li\u003e\n  \u003cli\u003eDurable construction designed for abrasion resistance\u003c\/li\u003e\n  \u003cli\u003ePrecision machining for consistent tooth engagement\u003c\/li\u003e\n  \u003cli\u003eWorks best with correct chain tension and lubrication\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan I use this on a go-kart with a Predator or 196–212cc engine?\u003c\/h3\u003e\n\u003cp\u003eThis sprocket suits many go-karts that accept a 40mm bore, 4-bolt 80mm BCD sprocket for 420 chains, including popular Predator 212 conversions and similar 196–200cc setups. Confirm your engine-to-rear-axle chain alignment and mount pattern before ordering to avoid fitment issues.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned for small-engine go-kart and mini-bike drivetrains\u003c\/li\u003e\n  \u003cli\u003eTypical applications include Predator 212 and 196cc-equipped karts\u003c\/li\u003e\n  \u003cli\u003eIntended for rear-sprocket use, not front countershaft if bolt pattern mismatches\u003c\/li\u003e\n  \u003cli\u003eNot suitable for #35 chain systems or non-420 pitch setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the exact dimensions and mounting specifications?\u003c\/h3\u003e\n\u003cp\u003eThe sprocket’s critical dimensions are provided so you can confirm compatibility visually or with a measuring tool. Using these specs prevents wasted returns and installation delays.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTeeth: 40 (420 pitch)\u003c\/li\u003e\n  \u003cli\u003eOverall diameter: 165 mm \/ 6-1\/2\"\u003c\/li\u003e\n  \u003cli\u003eCenter hole (bore): 40 mm \/ 1-9\/16\"\u003c\/li\u003e\n  \u003cli\u003eBolt hole circle (center-to-center): 80 mm \/ 3-3\/16\" (4-bolt pattern)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The YOXUFA 40T sprocket is ideal for DIY mechanics, mini-bike restorers, and go-kart builders who need a reliable 420-chain rear sprocket with a 40 mm bore and 4-bolt 80 mm BCD. Choose this part if your machine’s specifications match the listed dimensions and you want a cost-effective replacement that fits common Coleman, Baja, Massimo, TrailMaster, Axis, and Predator-based drivetrains. If your bike or kart uses a different chain pitch or bolt pattern, select a compatible sprocket to avoid improper fitment.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this sprocket compatible with #35 chains?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. This sprocket is specifically for 420 pitch chains and will not work with #35 or other chain sizes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What bolt pattern and bore does this sprocket use?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It uses a 4-bolt 80 mm bolt circle and a 40 mm center bore (1-9\/16\").\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"YOXUFA","offers":[{"title":"Default Title","offer_id":48087080566942,"sku":"B0CHW3DGMS","price":32.73,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/yoxufa-front-packaging-sprocket.jpg?v=1785916182","url":"https:\/\/northtrailauto.ca\/products\/yoxufa-40t-420-chain-mini-bike-go-kart-rear-sprocket-40mm-bore-80mm-4-bolt-bcd-durable-420-pitch","provider":"North Trail Auto","version":"1.0","type":"link"}