{"product_id":"jmchstore-50t-rear-sprocket-for-mini-bikes-6-hole-gold-zinc-207mm-40-41-420-chain","title":"JMCHstore 50T Rear Sprocket for Mini Bikes - 6-Hole Gold Zinc 207mm, #40\/41\/420 Chain","description":"\u003cp\u003e\u003cstrong\u003eJMCHstore 50-tooth rear sprocket (#40\/41\/420) is a balanced-performance replacement designed to improve acceleration and top speed for compatible mini bikes while resisting corrosion and wear.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis sprocket is a direct-fit aftermarket rear wheel component for a range of small motorcycles and mini bikes, engineered to deliver dependable power transfer for 212cc-class and larger engines. Machined from high-strength steel and finished with a gold zinc coating, it aims to reduce chain slip, extend drivetrain life, and withstand high RPMs and tough conditions. The part suits several popular models but does not fit go-karts because of different mounting patterns.\u003c\/p\u003e\n\n\u003ch3\u003eWhat machines will this 50T sprocket fit?\u003c\/h3\u003e\n\u003cp\u003eThe JMCHstore 50T sprocket is made to match #40, #41, and #420 chains and fits specific mini bike rear hubs with a 6-bolt pattern. Confirm your wheel's bolt circle and center bore before ordering to ensure compatibility.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible models listed include Coleman CT100U, CC100X, RB100\/B100, Mega Moto MMB80\/MMB105, Baja Doodle Bug DB30, Motovox MBX10, Oryxearth 105cc, and FPR GMB100 rear wheels.\u003c\/li\u003e\n  \u003cli\u003eMounting pattern: 6 holes, mounting hole diameter 6.5 mm, bolt circle (center-to-center) 49 mm.\u003c\/li\u003e\n  \u003cli\u003eCenter hole diameter: 37 mm; overall diameter: 207 mm (8.15 inches).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this sprocket change performance on my mini bike?\u003c\/h3\u003e\n\u003cp\u003eThis 50-tooth sprocket finds the middle ground between torque and top-end speed so you gain smoother acceleration without sacrificing cruising capability. Precision-cut teeth help the chain seat consistently, reducing slip and vibration under load.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBalanced tooth count offers improved off-the-line response with retained top speed potential.\u003c\/li\u003e\n  \u003cli\u003ePrecision machining reduces uneven wear and improves drivetrain efficiency.\u003c\/li\u003e\n  \u003cli\u003eGold zinc plating protects against rust so performance is more consistent in wet conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill it withstand heavy use and high RPMs?\u003c\/h3\u003e\n\u003cp\u003eYes — the sprocket is stamped from high-strength steel designed to handle elevated loads common with upgraded engines. The corrosion-resistant coating and robust teeth geometry prolong service life under frequent use.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMaterial: premium alloy\/high-strength steel for durability under stress.\u003c\/li\u003e\n  \u003cli\u003eFinish: gold zinc plating for long-term corrosion resistance.\u003c\/li\u003e\n  \u003cli\u003eIntended for 212cc-class and larger engines, engineered to minimize chain wear.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the exact measurements and chain type I should buy?\u003c\/h3\u003e\n\u003cp\u003eThe sprocket is made for #40\/#41\/#420 chain sizes and includes precise dimensions so you can match it to your wheel and chain. Double-check the bolt circle and center bore measurements against your rear hub drawings or existing sprocket.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTeeth: 50T; compatible chain sizes: #40, #41, #420.\u003c\/li\u003e\n  \u003cli\u003eMounting bolt circle (center-to-center): 49 mm (1.93 in); center hole diameter: 37 mm (1.46 in).\u003c\/li\u003e\n  \u003cli\u003eOverall diameter: 207 mm (8.15 in); six mounting holes, each 6.5 mm (0.26 in).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The JMCHstore 50T rear sprocket is ideal for riders upgrading or repairing mini bikes—especially owners of Coleman CT100U\/CC100X, Mega Moto MMB80\/MMB105, Baja Doodle Bug DB30, Motovox MBX10, and similar models—who want a corrosion-resistant, precision-made sprocket that balances acceleration and top speed. Do not purchase this part for go-karts; mounting patterns differ. Always verify your wheel's bolt pattern and chain size before installation to ensure correct 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: Does this sprocket fit go-karts?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. This sprocket does not fit go-karts because their mounting patterns are different from the listed mini bikes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What chain size do I need for this sprocket?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Use a #40, #41, or #420 chain; the sprocket is made for those chain standards and 50 teeth.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"JMCHstore","offers":[{"title":"Default Title","offer_id":55168464650583,"sku":"B0F4XHX7WZ","price":68.27,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/jmchstore-50t-sprocket-front-view.jpg?v=1790404834","url":"https:\/\/britishgarage.co.uk\/products\/jmchstore-50t-rear-sprocket-for-mini-bikes-6-hole-gold-zinc-207mm-40-41-420-chain","provider":"British Garage","version":"1.0","type":"link"}