{"product_id":"ssp-g-67mm-cylinder-kit-4-valve-gy6-b-161qmk-engines","title":"SSP-G 67mm Big Bore Cylinder Kit - GY6-B 57mm Stud Spacing","description":"\u003cp\u003eThis \u003cstrong\u003eSSP-G 67mm four-valve cylinder kit\u003c\/strong\u003e is a big-bore upgrade for compatible GY6 B-case \/ GY7 builds, giving you the foundation for a stronger-pulling off-road engine. A ceramic-coated cylinder helps dissipate heat and reduce friction, while the forged piston provides strength for a performance build. Pair it with a matching four-valve Cygnus-style head and the appropriate crankshaft; the nominal 232cc configuration requires a separate 66mm-stroke crankshaft.\u003c\/p\u003e\u003cp\u003eThis product is intended for off-road use only. This product is not intended for use on public roads or land.\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e67mm big-bore foundation:\u003c\/strong\u003e Supports a larger-displacement engine build with the matching head and crankshaft combination.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCeramic-coated cylinder:\u003c\/strong\u003e Improves heat dissipation and reduces friction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForged piston:\u003c\/strong\u003e Stronger and lighter than a cast piston for high-performance applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-valve configuration:\u003c\/strong\u003e Designed for a compatible Cygnus-style four-valve cylinder head.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eB-case mounting:\u003c\/strong\u003e Requires 57mm cylinder-stud spacing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded rebuild components:\u003c\/strong\u003e Cylinder, piston, rings, wrist pin, circlips, head gasket and base gasket.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e SSP-G\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 169-573\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart type:\u003c\/strong\u003e Big-bore cylinder and piston kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore:\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\u003eCylinder-stud 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\u003eCylinder coating:\u003c\/strong\u003e Ceramic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiston construction:\u003c\/strong\u003e Forged\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRequired cylinder head:\u003c\/strong\u003e Compatible four-valve Cygnus-style head, not included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal 232cc build:\u003c\/strong\u003e Requires a separate 66mm (+8.2mm) stroker crankshaft; displacement depends on the completed bore-and-stroke combination\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of origin:\u003c\/strong\u003e Taiwan\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eEngine platform\u003c\/th\u003e\n\u003cth\u003eRequired configuration\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eGY6-B \/ GY7 \/ 161QMK four-stroke builds\u003c\/td\u003e\n\u003ctd\u003eB-case with \u003cstrong\u003e57mm cylinder-stud spacing\u003c\/strong\u003e \u003cstrong\u003eand matching four-valve head\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGY6 125\/150cc QMI152 \/ QMJ157 applications\u003c\/td\u003e\n\u003ctd\u003eCompatible B-case configuration only; \u003cstrong\u003econfirm 57mm stud spacing\u003c\/strong\u003e and complete build dimensions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eEngine code or long-case designation alone does not establish fitment. Confirm crankcase cylinder-opening clearance, cylinder height, wrist pin, crankshaft stroke and head compatibility before assembly. Cygnus-style describes the head design, not direct Yamaha Cygnus model fitment. The kit includes the cylinder, forged piston, rings, wrist pin, circlips, head gasket and base gasket; the cylinder head and stroker crankshaft are separate.\u003c\/p\u003e","brand":"SSP-G","offers":[{"title":"Default Title","offer_id":67964658975041,"sku":"169-573","price":390.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/795929.jpg?v=1792945438","url":"https:\/\/azscooterparts.com\/products\/ssp-g-67mm-cylinder-kit-4-valve-gy6-b-161qmk-engines","provider":"AZScooterParts","version":"1.0","type":"link"}