{"title":"High Performance Cylinder Kits","description":"Upgrade your GY6 scooter with a high performance cylinder kit from Monster Scooter Parts. A properly installed GY6 cylinder kit will give you much better torque, with enhanced low end acceleration. The greater engine power resulting from a new scooter cylinder kit will increase your scooter's overall top speed as well.\u003cbr\u003e\u003cbr\u003eMonster Scooter Parts offers high performance cylinder kit packages for both small 50cc GY6 engines, as well as for the larger 125cc and 150cc engine sizes. Look through our listing below to find the scooter cylinder kit for your GY6 engine. Please check the Specifications tabs carefully as there are many minor variations to these Chinese engines.\u003cbr\u003e\u003cbr\u003eRestore your scooter's road energy with a high-quality GY6 cylinder kit today.\u003cbr\u003e\u003cbr\u003e","products":[{"product_id":"50cc-72cc-high-performance-scooter-engine-kit","title":"72cc 47 mm High Performance Big Bore Cylinder Kit for 50cc QMB139 Scooter Engines","description":"Our 72cc scooter big bore cylinder kit is great for increasing overall performance on small under-powered 50cc QMB139 scooter engines.\u003cbr\u003e\n\u003cbr\u003e\nEngine kit increases engine bore size from 50cc to 72cc and includes everything shown in the image; cylinder, rings, and gaskets.\u003cbr\u003e\u003cbr\u003e\nThis 72cc scooter engine kit increases low end acceleration as well as top speed.\u003cbr\u003e\n\u003cbr\u003e\nThis high performance scooter big bore engine kit is easy to install. Combine with a high performance carburetor and high performance exhaust and get peak performance from your 50cc gas scooter.\u003cbr\u003e\n\u003cbr\u003e\n\u003cb\u003eNote:\u003c\/b\u003e This high performance cylinder kit is only compatible with 4-stroke 50cc QMB139 engines.","brand":"Monster Scooter Parts","offers":[{"title":"Default Title","offer_id":44337105830050,"sku":"K72-7916","price":38.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6943\/0690\/files\/k72-7916.jpg?v=1774816261"},{"product_id":"70cc-high-performance-scooter-engine-kit","title":"81cc High Performance Cylinder Kit for 50cc GY6 139QMB Scooter Engines","description":"81cc high performance cylinder kit for 50cc GY6 139QMB scooter engines, by manufacturer NCY.\u003cbr\u003e\n\u003cbr\u003e\nThis scooter upgrade kit is a high quality kit that is perfect for upgrading your old 50cc 139QMB engine to 81cc so you don’t get left behind in today’s fast paced world.\u003cbr\u003e\n\u003cbr\u003e\nInstalling this upgrade kit will increase your engine bore size to 81cc, and includes an aluminum cylinder, 50 mm piston, piston rings, and gaskets.\u003cbr\u003e\n\u003cbr\u003e\nAfter installation, you will see an immediate increase in low end acceleration and an increase in top speed!\u003cbr\u003e\n\u003cbr\u003e\nThis 81cc scooter cylinder kit does not include the cylinder head. Use this kit with the NCY 50 mm cylinder head which can be found here:\u003cbr\u003e\n\u003cbr\u003e\n\u003ca href=\"http:\/\/www.monstorscooterparts.shop\/50cc-high-performance-cylinder-head.html\"\u003e50 mm High Performance Scooter Cylinder Head\u003c\/a\u003e\u003cbr\u003e\n\u003cbr\u003e\nCombine this kit with a high performance carburetor and exhaust for an even larger boost in performance.","brand":"NCY","offers":[{"title":"Default Title","offer_id":44337105895586,"sku":"K72-7917","price":209.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6943\/0690\/files\/70cc-high-performance-scooter-engine-kit_1.jpg?v=1774816269"},{"product_id":"81cc-high-performance-50-mm-cylinder-head-for-gy6-139qmb-scooter-engines","title":"81cc High Performance 50 mm Cylinder Head for GY6 139QMB Scooter Engines","description":"\u003cp\u003eThis is our high performance 50 mm cylinder head by NCY.\u003cbr\u003e\u003cbr\u003eThe 50 mm cylinder head is for use with NCY 81cc cylinder kits, and is compatible with 50cc GY6 139QMB engines.\u003cbr\u003e\u003cbr\u003eLet Monster Scooter Parts be your source for NCY scooter parts and accessories.\u003cbr\u003e\u003cbr\u003e1100-1239\u003c\/p\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":44337106059426,"sku":"K72-7919","price":269.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6943\/0690\/files\/k72-7919_1.jpg?v=1774816283"},{"product_id":"50cc-high-performance-cylinder-kit-for-50cc-gy6-qmb139-scooter-engines","title":"50cc High Performance Cylinder Kit for 50cc GY6 QMB139 Scooter Engines","description":"Our 50cc high performance scooter cylinder kit is great for increasing overall performance on small 50cc GY6 QMB139 scooter engines. The 50cc scooter engine kit increases low end acceleration as well as top speed.\u003cbr\u003e\u003cbr\u003e\nThis engine kit includes everything shown in the image; cylinder, rings, gaskets, roller weights, and more. This kit also comes with the cylinder head and valves and is our most complete 50cc engine upgrade kit available. This high performance scooter engine kit is easy to install. Combine with a high performance carburetor and high performance exhaust and get peak performance from your 50cc gas scooter.\u003cbr\u003e\u003cbr\u003e\n\u003cb\u003eNote:\u003c\/b\u003e This high performance cylinder kit is only compatible with 4-stroke 50cc GY6 engines. In addition, a ring compressor may be necessary in order to install the piston in the cylinder included in this kit.","brand":"Monster Scooter Parts","offers":[{"title":"Default Title","offer_id":44337106157730,"sku":"K72-7922","price":101.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6943\/0690\/files\/k72-7922_1_1.jpg?v=1774816293"},{"product_id":"158cc-high-performance-cylinder-kit-for-125cc-150cc-gy6-scooter-engines","title":"158cc High Performance Cylinder Kit for 125cc \u0026 150cc GY6 Scooter Engines","description":"158cc high performance cylinder kit for 125cc \u0026amp; 150cc GY6 scooter engines, by manufacturer NCY.\u003cbr\u003e\n\u003cbr\u003e\nA high quality kit that can be used to upgrade 125cc \u0026amp; 150cc GY6 scooter engines to 158cc that is ideal for modern city and highway riding. Easy bolt on installation.\u003cbr\u003e\n\u003cbr\u003e\nUpgrading your 150cc GY6 has never been more convenient with this easy to install upgrade kit. This scooter upgrade kit increases your engine bore size to 158cc with a 61 mm piston diameter.\u003cbr\u003e\n\u003cbr\u003e\nIncludes an aluminum cylinder with piston, rings, and gaskets. You will see a direct increase in performance after installation with both enhanced low end acceleration and improved top speed.\u003cbr\u003e\n\u003cbr\u003e\nCombine this kit with a high performance carburetor and exhaust for an even larger boost in performance.\u003cbr\u003e\n\u003cbr\u003e\n\u003cb\u003eNCY\u003c\/b\u003e: 1100-1288","brand":"NCY","offers":[{"title":"Default Title","offer_id":44337106190498,"sku":"K72-7921","price":216.64,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6943\/0690\/files\/92cc-high-performance-scooter-engine-kit_1.jpg?v=1774816300"},{"product_id":"172cc-big-bore-kit-for-150cc-gy6-scooter-engines","title":"172cc Big Bore Kit for 150cc GY6 Scooter Engines","description":"Our 172cc Big Bore engine kit increases the 150cc GY6 engine bore size from 150cc to 172cc, enhancing performance for a better ride. Use this 172cc scooter cylinder kit to increase the low-end acceleration as well as your scooter's top speed. This kit includes the piston, cylinder, rings, gaskets, and more. \n\u003cbr\u003e\u003cbr\u003e\nAcceleration and top speed are two primary attributes of a GY6 powered motor scooter that dedicated street-scooterists demand, and the bigger the bore, the better the scooter's performance. \n\u003cbr\u003e\u003cbr\u003e\n\u003cb\u003eNote:\u003c\/b\u003e The 61 mm bore size is common to most Chinese-made 150cc GY6 horizontal engines. Some engines may require reaming.","brand":"Monster Scooter Parts","offers":[{"title":"Default Title","offer_id":44337106256034,"sku":"K72-7931","price":39.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6943\/0690\/files\/k72-7931--1.jpg?v=1774816312"},{"product_id":"150cc-big-bore-high-performance-cylinder-kit-for-gy6-scooter-engines","title":"150cc Cylinder Kit for GY6 Scooter \u0026 Go-Kart Engines","description":"The 150cc Cylinder Kit for GY6 scooter \u0026amp; go-kart engines includes everything shown in the image; cylinder, piston, rings, gaskets, and more. This high-performance scooter engine kit is easy to install. Combine with a high-performance carburetor and high-performance exhaust and get peak performance from your 150cc gas scooter. \u003cbr\u003e\u003cbr\u003e\nThe GY6 engine is the heart of today's scooter technology, and the 150cc is a very popular size. This kit will help you add the \"oomf!\" to your street or off road go kart machine.","brand":"Monster Scooter Parts","offers":[{"title":"Default Title","offer_id":44337106223266,"sku":"K72-7930","price":39.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6943\/0690\/files\/k72-7930_7.jpg?v=1774816324"},{"product_id":"gy6-150-stage-1-performance-kit-ncy","title":"GY6 150 Stage 1 Performance Kit (NCY)","description":"The GY6 150 Stage 1 Performance Kit is a high quality bundle of goodies made by NCY, a well-known maker of top quality aftermarket scooter parts and accessories. This is a great upgrade for your scooter, as the variator\/transmission parts offers quicker acceleration, higher top speeds, and makes your CVT the smoothest around. In addition, the slick exhaust system features the muffler, pipe, and clamp.\n\u003cbr\u003e\u003cbr\u003e\nThe Stage 1 kit includes a great looking stainless NCY exhaust, and an NCY variator kit with the spring, roller weights, variator, clutch assembly, drive face, and flywheel.","brand":"NCY","offers":[{"title":"Default Title","offer_id":44337345200290,"sku":"N71-3951","price":421.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6943\/0690\/files\/n71-3951_2.jpg?v=1774880413"}],"url":"https:\/\/monstorscooterparts.shop\/collections\/street-scooters-high-performance-parts-high-performance-cylinders.oembed","provider":"Monster Scooter Parts","version":"1.0","type":"link"}