{"product_id":"scooterworks-big-bore-kit-63mm-180cc-gy6-150","title":"RDLN 63mm 180cc Big Bore Kit - GY6 125cc \u0026 150cc","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eThis \u003cstrong\u003eRDLN 63mm 180cc Big Bore Kit\u003c\/strong\u003e takes a GY6 125cc or 150cc engine (based on the Honda GY6 design) up to 180cc for more low-end torque and stronger hill-climbing power. It's a complete top end in one box, a popular upgrade for scooters, go-karts, buggies and small utility vehicles running a GY6.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCase boring required:\u003c\/strong\u003e The cylinder sleeve measures 64.9mm on the outside, so your engine case will likely need to be bored out to fit it. Forcing the cylinder in without boring will damage it. Use the Engine Case Boring Tool (202-37) for the job.\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e180cc displacement:\u003c\/strong\u003e 63mm bore with the stock 57.8mm GY6 stroke.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete top-end kit:\u003c\/strong\u003e Cylinder, piston, wrist pin, circlips, ring set and gaskets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinned aluminum cylinder:\u003c\/strong\u003e Deep cooling fins to help shed heat.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits 54mm stud spacing:\u003c\/strong\u003e Made for standard GY6 125\/150cc engine cases.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 1100-1438\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 812722026165\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore:\u003c\/strong\u003e 63mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplacement:\u003c\/strong\u003e 180cc (with stock 57.8mm stroke)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSleeve outer diameter:\u003c\/strong\u003e 64.9mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder height:\u003c\/strong\u003e 90.5mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStud spacing:\u003c\/strong\u003e 54mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Cylinder, piston, wrist pin, 2 circlips, 5-piece ring set, base gasket, head gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplacement rings:\u003c\/strong\u003e \u003ca href=\"\/products\/piston-rings-63mm-cylinder-kit-gy6?variant=67964649931073\"\u003eRDLN 63mm Piston Ring Set (1100-1463)\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlso listed as:\u003c\/strong\u003e OPS 164-310\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e RDLN\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eExamples\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eGY6 engine codes\u003c\/td\u003e\n\u003ctd\u003e152QMI, 157QMJ, 161QMK, 1P57QMJ, 1P61QMK, YN1P57QMJ, JJ157QMJ, BN157QMJ, BN161QMK-A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScooters\u003c\/td\u003e\n\u003ctd\u003eZNEN, Wolf, Ice Bear, Bintelli, Lance, Jonway, Roketa and other GY6 125\/150cc models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGo-karts and buggies\u003c\/td\u003e\n\u003ctd\u003eHammerhead 150 series, Carter Talon 150, TrailMaster 150 XRX\/XRS, American SportWorks, Manco 150\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eATVs and UTVs\u003c\/td\u003e\n\u003ctd\u003eTaoTao Bull 150, Rhino 150 and other GY6 150cc utility models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eCase boring is required on all applications. Check the engine code stamped on your engine case to confirm fit.\u003c\/p\u003e\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBore the engine case to fit the 64.9mm sleeve before installing.\u003c\/li\u003e\n\u003cli\u003eA bigger engine needs more fuel. Re-jet your stock carburetor or upgrade to a larger performance carb.\u003c\/li\u003e\n\u003cli\u003eA performance camshaft pairs well with this kit to make the most of the extra displacement.\u003c\/li\u003e\n\u003cli\u003eBreak the engine in gently for the first few hundred miles.\u003c\/li\u003e\n\u003c\/ul\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\u003eProduct Diagrams\u003c\/h2\u003e\u003cul class=\"az-content-resources\"\u003e\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=244\"\u003eGY6 CYLINDER\u003c\/a\u003e \u003cspan\u003eCallout 1\u003c\/span\u003e\n\u003c\/li\u003e\u003c\/ul\u003e","brand":"RDLN","offers":[{"title":"Default Title","offer_id":67964639772993,"sku":"1100-1438","price":127.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-9263-0-1100-1438_6e3c871f-9e80-4cec-96eb-885b578e8a7f.jpg?v=1792558031","url":"https:\/\/azscooterparts.com\/products\/scooterworks-big-bore-kit-63mm-180cc-gy6-150","provider":"AZScooterParts","version":"1.0","type":"link"}