{"product_id":"ncy-racing-valves-gy6-1100-1257","title":"NCY High-RPM Racing Valve Set - 28\/23mm for GY6","description":"\u003ch2\u003eUnlock High-RPM Power: NCY Performance Racing Valves\u003c\/h2\u003e\u003cp\u003eExperience a \"night and day\" difference in idle quality and high-end pull with \u003cstrong\u003eNCY Performance Racing Valves\u003c\/strong\u003e. Engineered to withstand the extreme temperatures of tuned GY6 engines, these valves provide a superior seal compared to soft factory units that often stretch or leak under high stress.\u003c\/p\u003e\u003ch3\u003ePerformance \u0026amp; Engineering\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Lapped Seats:\u003c\/strong\u003e Factory-machined to ensure a perfect 360-degree seal, effectively eliminating compression loss and erratic idling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Heat Durability:\u003c\/strong\u003e Resists the \"mushrooming\" and carbon buildup common in standard OEM valves, maintaining consistent valve lash for longer service intervals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Flow Profile:\u003c\/strong\u003e Designed to complement high-flow heads like the NCY Big Valve series, allowing your engine to breathe deeper at 10,000+ RPM.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium Manufacturing:\u003c\/strong\u003e Manufactured to strict quality standards for a level of balance and longevity far superior to unbranded replacement valves.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eComprehensive Fitment Guide\u003c\/h3\u003e\u003cp\u003eThese 28mm intake and 23mm exhaust valves are a direct performance upgrade for \u003cstrong\u003e125cc, 150cc, and 171cc\u003c\/strong\u003e 4-stroke engines.\u003c\/p\u003e\u003ctable style=\"width: 100%;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eVehicle Type\u003c\/th\u003e\n\u003cth\u003eEngine Codes \u0026amp; Models\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGenuine Scooter Co.\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBuddy 125, Buddy 150, Buddy 170i, Blur 150\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStandard GY6 Codes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e157QMJ, 152QMI, 161QMK, 1P61QMK, YN1P57QMJ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTop End Kits\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e58.5mm (155cc), 61mm (171cc), 62mm, and 63mm BBKs\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\u003eIntake Valve (IN):\u003c\/strong\u003e 27.8mm Diameter | 65.75mm Height | 5.0mm Stem\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust Valve (EX):\u003c\/strong\u003e 22.90mm Diameter | 65.3mm Height | 5.0mm Stem\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 1100-1257\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003cblockquote\u003e\n\u003cstrong\u003eTech Tip:\u003c\/strong\u003e For optimum performance, these valves should be paired with \u003ca href=\"#\"\u003eNCY Performance Valve Springs\u003c\/a\u003e rated for 11,000 RPM. Always lap your new valves into the head using a fine-grit grinding compound to ensure a gas-tight seal before final assembly.\u003c\/blockquote\u003e\u003cp style=\"font-size: 0.85em; color: #d9534f; font-weight: bold;\"\u003eOFF-ROAD USE ONLY: This product is intended for closed-course racing. Not legal for use on public roads in California or on pollution-controlled vehicles.\u003c\/p\u003e\u003ch3 style=\"color: #983d3c;\"\u003eThis product is not intended for use on public roads or land.\u003c\/h3\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":46756522066200,"sku":"1100-1257","price":37.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/1728\/1816\/files\/1100-1257.webp?v=1773772600","url":"https:\/\/www.scooterworks.com\/products\/ncy-racing-valves-gy6-1100-1257","provider":"Scooterworks USA, LLC","version":"1.0","type":"link"}