{"product_id":"gy6-crankshaft-complete","title":"GY6 Crankshaft (Complete)","description":"\u003ch2\u003eFull Crankshaft for GY6 125cc\/150cc Engines\u003c\/h2\u003e\u003cp\u003eThis crankshaft is a direct OEM-style replacement for GY6 125cc and 150cc scooter engines. It is built for simple fitting and plays a key role in keeping the engine running properly. It belongs to the range of \u003ca href=\"\/collections\/gy6-scooter-parts\"\u003eGY6 scooter parts\u003c\/a\u003e that can help bring back your scooter's power and efficiency. It suits riders who need a dependable option when original parts are hard to find or expensive.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cp\u003eThe crankshaft comes with main bearings and is made for specific engine applications. Its stroke is 57.8mm, which supports solid performance in your scooter. Overall length is 285mm, and both the flywheel and drive end use M12x1.25 threads. The piston, pin and circlips are not included, but they are easy to find online.\u003c\/p\u003e\u003ch3\u003eWhen to Replace Your Crankshaft\u003c\/h3\u003e\u003cp\u003eYou may need a new crankshaft if the engine starts to lose performance or develops unusual vibration. A worn or damaged crankshaft can reduce power and efficiency. If you are rebuilding the engine or swapping other internal parts, it is a good time to consider replacing the crankshaft as well.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStroke:\u003c\/strong\u003e 57.8mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length:\u003c\/strong\u003e 285mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlywheel Thread Size:\u003c\/strong\u003e M12x1.25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlywheel Thread Length:\u003c\/strong\u003e 14mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive End Thread Size:\u003c\/strong\u003e M12x1.25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive End Thread Length:\u003c\/strong\u003e 14mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInner Diameter (Piston Pin Hole):\u003c\/strong\u003e 15mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Splines:\u003c\/strong\u003e 19\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMain Bearings:\u003c\/strong\u003e Included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e GY6 150cc (157QMJ) 157QMJ-based 125cc\/150cc\/169cc GY6 engines by engine code\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits:\u003c\/p\u003e\u003cul\u003e\u003cli\u003eGY6 150cc (157QMJ) (157QMJ-based engines: 157QMJ, 161QMK, 152QMI, 1P61QMK, YN1P57QMJ, 1P52FMI, 154FMI, JJ157QMJ, 1P57QMJ, BN157QMJ, BN161QMK-A, other QMJ\/QMK\/QMI, and any engine code with QM or FM)\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e Compare your engine code with the list above. Codes that contain \"QM\" or \"FM\" are shown as compatible. The piston, pin and circlips are sold separately.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere it goes:\u003c\/strong\u003e part #1 on the crankshaft and piston diagram for the GY6 150cc (157QMJ).\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-engines\"\u003eScooter Engines \u0026amp; Engine Parts\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":51138809856057,"sku":"TT-26867","price":56.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/crankshaft-complete-for-gy6-1.jpg?v=1794377966","url":"https:\/\/www.trendtimes.com\/products\/gy6-crankshaft-complete","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}