{"product_id":"jmchstore-60t-high-torque-rear-sprocket-for-mini-bikes-gold-zinc-6-hole-40-41-420-chain","title":"JMCHstore 60T High-Torque Rear Sprocket for Mini Bikes - Gold Zinc, 6-Hole #40\/41\/420 Chain","description":"\u003cp\u003e\u003cstrong\u003eJMCHstore's 60-tooth gold-zinc rear sprocket is a heavy-duty replacement designed to increase low-end torque and climbing ability for compatible mini bikes using #40, #41 or 420 chains.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis precision-machined sprocket fits many popular small-bike models (Coleman CT100U, CC100X, Mega Moto MMB80\/MMB105, Baja Doodle Bug DB30, Motovox MBX10, and similar platforms) and is built to handle upgraded engines 212cc and larger. Its 60-tooth profile delivers stronger acceleration and improved pulling power on steep trails while the corrosion-resistant gold zinc plating extends life in wet, dusty, or salty conditions. Before ordering, verify mounting pattern and tire diameter compatibility to ensure correct fit and safe operation.\u003c\/p\u003e\n\n\u003ch3\u003eWill this sprocket fit my mini bike and chain?\u003c\/h3\u003e\n\u003cp\u003eCompatibility depends on your bike's bolt pattern, center hole, and chain size. The JMCHstore 60T is made for #40\/#41\/420 chains and a six-bolt mounting layout with specific dimensions; it does not fit go-karts with different mounting patterns.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eChain size: #40, #41 or 420 compatible\u003c\/li\u003e\n  \u003cli\u003eMounting: 6 holes, bolt circle 49 mm (center-to-center)\u003c\/li\u003e\n  \u003cli\u003eCenter hole: 37 mm diameter; mount holes 6.5 mm each\u003c\/li\u003e\n  \u003cli\u003eOverall diameter: 245 mm (9.65 in)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does a 60-tooth sprocket change performance?\u003c\/h3\u003e\n\u003cp\u003eA 60T rear sprocket increases mechanical advantage, shifting power toward low-speed torque rather than top speed. This makes starts, hill climbs, and technical off-road maneuvers easier while slightly reducing maximum velocity on flat runs.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eStronger low-end acceleration and throttle response\u003c\/li\u003e\n  \u003cli\u003eBetter climbing and load-pulling capability on inclines\u003c\/li\u003e\n  \u003cli\u003eReduced chain slip thanks to precision-cut teeth\u003c\/li\u003e\n  \u003cli\u003eBest paired with higher-displacement engines (212cc+)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs this sprocket durable and weather-resistant?\u003c\/h3\u003e\n\u003cp\u003eThe sprocket is CNC-cut from high-strength steel and finished with a gold zinc coating for corrosion resistance. These choices extend drivetrain life under high loads and in varied weather, while precision tooth profiling reduces wear on the chain.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh-strength steel core resists bending under load\u003c\/li\u003e\n  \u003cli\u003eGold zinc plating protects against rust and corrosion\u003c\/li\u003e\n  \u003cli\u003ePrecision teeth minimize chain wear and noise\u003c\/li\u003e\n  \u003cli\u003eSuitable for off-road and all-season use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat measurements and installation considerations should I know?\u003c\/h3\u003e\n\u003cp\u003eMeasure tire diameter and verify mount spacing before upgrading to a 60T sprocket; a too-large sprocket can contact the tire if the wheel is small. This model lists exact dimensions so you can compare with your hub and axle clearance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRecommended minimum tire: 145\/70-6 to avoid interference\u003c\/li\u003e\n  \u003cli\u003eBolt hole circle (center-to-center): 49 mm (1.93 in)\u003c\/li\u003e\n  \u003cli\u003eCenter bore: 37 mm (1.46 in); six 6.5 mm mount holes\u003c\/li\u003e\n  \u003cli\u003eIf unsure, measure wheel\/tire assembly or consult a mechanic\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Riders upgrading a mini bike for better low-end performance, riders who regularly tackle steep trails or carry loads, and mechanics replacing worn sprockets on compatible Coleman, Baja, Motovox, Mega Moto and similar mini bikes. Avoid this part if your machine uses a different mounting pattern (common on go-karts) or if your tire diameter is below the recommended size.\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: Can this sprocket work with my go-kart?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No—this 60T sprocket uses a six-hole mini bike mounting pattern and typically does not match go-kart bolt patterns.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What minimum tire size do I need for a 60T sprocket?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Use at least a 145\/70-6 tire to prevent the large 60T sprocket from contacting the tire.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"JMCHstore","offers":[{"title":"Default Title","offer_id":48086480355486,"sku":"B0DR72CDFV","price":45.47,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/jmchstore-60t-sprocket-front-view.jpg?v=1785899062","url":"https:\/\/northtrailauto.ca\/products\/jmchstore-60t-high-torque-rear-sprocket-for-mini-bikes-gold-zinc-6-hole-40-41-420-chain","provider":"North Trail Auto","version":"1.0","type":"link"}