{"product_id":"ncy-cylinder-kit-aluminum-61mm-171cc-genuinegy6-1100-1288","title":"NCY Aluminum Big Bore Kit - 171cc (61mm) - No Case-Cut - GY6","description":"\u003ch2\u003eNCY 171cc Big Bore Kit (61mm) — No Case-Cut for GY6 150\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eNCY 61mm Cylinder Kit\u003c\/strong\u003e is the only 171cc upgrade available in the U.S. designed to fit without machining your engine cases. Featuring a specialized 62.9mm outer skirt, this aluminum cylinder drops directly into standard GY6 150cc blocks. It is the ultimate \"weekend project\" for riders demanding a massive jump in torque and acceleration without the need for professional machine shop services.\u003c\/p\u003e\u003ch3\u003eThe NCY Performance Advantage\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrue Bolt-On Engineering:\u003c\/strong\u003e Slim-skirt design eliminates the need to \"split the cases\" or grind the engine block for clearance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdvanced Thermal Cooling:\u003c\/strong\u003e All-aluminum construction dissipates heat significantly faster than stock cast-iron cylinders, preventing power fade during long-distance riding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-RPM Piston:\u003c\/strong\u003e Includes a specialized \"short-skirt\" racing piston to reduce reciprocating mass, allowing for faster revving and higher top-end potential.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComprehensive Kit:\u003c\/strong\u003e Includes cylinder, piston, rings, wrist pin, clips, and performance gaskets.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDetailed Model Fitment\u003c\/h3\u003e\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003cthead\u003e\u003ctr style=\"background-color: #f8f8f8; text-align: left;\"\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd;\"\u003eCategory\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd;\"\u003eCompatible Models \/ Codes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eGenuine Scooter Co.\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eBuddy 125, Buddy 150, Buddy 170i, Hooligan 170i, Blur 150\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eGo-Karts \/ Buggies\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eHammerhead 150, Trailmaster 150 (all variants), Yerf-Dog, Carter Talon\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eChinese GY6 Brands\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eTaoTao, Wolf, Ice Bear, Bintelli, Peace Sports, ZNEN, SSR, Kymco\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eEngine Codes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e157QMJ, 1P57QMJ, 152QMI, 161QMK, BN157QMJ, BN161QMK-A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplacement:\u003c\/strong\u003e 171.3cc (61mm Bore)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter Skirt Diameter:\u003c\/strong\u003e 62.99mm (Direct Fit)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e High-Grade Aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 1100-1288\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv style=\"background-color: #fff5f5; border-left: 5px solid #ff4d4d; padding: 15px; margin: 20px 0;\"\u003e\n\u003cstrong\u003eIMPORTANT FUELING NOTE:\u003c\/strong\u003e A big bore kit requires significantly more fuel. You \u003cstrong\u003emust upjet your carburetor\u003c\/strong\u003e (typically to a #125 or #130 main jet) to prevent a lean condition. To reach the full power potential of 171cc, we highly recommend pairing this with the \u003cstrong\u003eNCY Big Valve Head (SKU 1100-1254)\u003c\/strong\u003e.\u003c\/div\u003e\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"color: rgb(186, 13, 13);\"\u003e\u003cb\u003eThis product is not intended for use on public roads or land.\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"color: rgb(186, 13, 13);\"\u003e\u003cb\u003eThis product is not legal for use in California on pollution-controlled vehicles. Check local laws before installation.\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\u003chr\u003e\u003cp\u003e?? \u003ca href=\"https:\/\/www.p65warnings.ca.gov\" target=\"_blank\"\u003eCalifornia Prop 65 Warning\u003c\/a\u003e\u003c\/p\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":46756543529240,"sku":"1100-1288","price":171.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/1728\/1816\/products\/1100-1288_837e0f13-d892-446e-adea-4de8873ba38b.jpg?v=1695269092","url":"https:\/\/www.scooterworks.com\/products\/ncy-cylinder-kit-aluminum-61mm-171cc-genuinegy6-1100-1288","provider":"Scooterworks USA, LLC","version":"1.0","type":"link"}