{"product_id":"gy6-161qmk-engines-67mm-cylinder-kit-4-valve","title":"GY6 161QMK Engines 67mm Cylinder Kit 4 Valve","description":"\u003ch2\u003e67mm Cylinder Kit for GY6-B\/GY7\/161QMK Engines\u003c\/h2\u003e\u003cp\u003eThis 67mm 4 Valve Cylinder Kit suits GY6-B, GY7, and 161QMK engines, raising displacement to 232cc when used with a matching stroker crank. It comes with a ceramic-coated cylinder and a forged piston, so it appeals to riders looking for a dependable performance option. Within our \u003ca href=\"\/collections\/gy6-scooter-parts\"\u003eGY6 scooter parts\u003c\/a\u003e range, this kit is built for four-valve engines, which helps it fit correctly and deliver better output.\u003c\/p\u003e\u003ch3\u003eCylinder Construction\u003c\/h3\u003e\u003cp\u003eThe cylinder is coated in ceramic, which helps it shed heat and cut down on friction for smoother efficiency. The forged piston supplied with the kit weighs less and is tougher than standard cast pistons, which makes it a good match for demanding builds. Every part needed for installation is included, so you have everything for a complete upgrade.\u003c\/p\u003e\u003ch3\u003eInstallation and Compatibility\u003c\/h3\u003e\u003cp\u003eThis kit is made for B-case GY6 4-stroke engines with 57mm stud spacing. It works with four-valve setups and can be fitted without extra modifications. If you want more power and efficiency from your engine, replacing the cylinder is the recommended step.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder Bore:\u003c\/strong\u003e 67mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder Height:\u003c\/strong\u003e 76mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Height:\u003c\/strong\u003e 103.5mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStud Spacing:\u003c\/strong\u003e 57mm (B-case)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWrist Pin Diameter:\u003c\/strong\u003e 15mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Engine:\u003c\/strong\u003e GY6 QMI\/QMJ 152\/157 (B-case long case)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Displacement:\u003c\/strong\u003e 232cc (with 66mm stroker crank)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e GY6 B-case \/ GY7 161QMK builds with 57mm stud spacing and a matching four-valve Cygnus-style head\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eGY6 QMI152\/QMJ157 engines (B-case long case, 57mm stud spacing, four-valve head required)\u003c\/li\u003e\n\u003cli\u003eGY6-B \/ GY7 \/ 161QMK four-stroke builds (B-case, 57mm stud spacing)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e Confirm your crankcase has 57mm cylinder-stud spacing and a B-case long case, and pair this kit with a four-valve Cygnus-style head.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShop more:\u003c\/strong\u003e \u003ca href=\"\/collections\/gy6-scooter-parts\"\u003eGY6 Scooter Parts\u003c\/a\u003e · \u003ca href=\"\/collections\/chinese-scooter-parts\"\u003eChinese Scooter Parts\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-cylinder-kits\"\u003eScooter Big Bore \u0026amp; Cylinder Kits\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-cylinder-heads\"\u003eScooter Cylinder Heads \u0026amp; Valves\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-parts\"\u003eScooter Parts\u003c\/a\u003e\u003c\/p\u003e","brand":"Trend Times Toy Stores","offers":[{"title":"Default Title","offer_id":51135732023353,"sku":"TT-16393","price":386.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/67mm-cylinder-kit-4-valve-for-gy6-161qmk-engines-1.jpg?v=1794349641","url":"https:\/\/www.trendtimes.com\/products\/gy6-161qmk-engines-67mm-cylinder-kit-4-valve","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}