{"title":"Crankcase Parts","description":"Monster Scooter Parts has the crankcase parts for your 50cc, 110cc, 125cc, 150cc, and 250cc scooter engine. \n\nIncluded in the crankcase parts group are scooter kick start arms, starter gears, starter shafts and more.\u003cbr\u003e\u003cbr\u003eWhile most crankcase parts are pretty durable, all things eventually wear out or break. When that happens, and it will, we will be here to find the correct replacement part for your scooter.\u003cbr\u003e\u003cbr\u003eWe stock a wide range of crankcase parts for Chinese-built 50cc GY6 QMB139, 125cc GY6 QMI152\/157 and 150cc GY6 QMJ152\/157 engines, as well as Honda and Vespa engines.\n\n\u003cbr\u003e\n\n\u003cbr\u003e\n\n\u003cbr\u003e\n\nWe are constantly expanding our inventory of crankcase parts for all makes and models of gas scooters, so check this page often. Don't see what you need? Call Monster Scooter Parts!\u003cbr\u003e\u003cbr\u003e","products":[{"product_id":"kick-start-arm-assembly","title":"Kick Start Arm Assembly for 50cc 139QMB Scooters","description":"Universal replacement kick start arm assembly for 50cc 139QMB scooters, including models from Baja Motorsports (the SC50 50cc) and countless other models of GY6 style gas scooters. This kick start arm is designed to be mounted on the right side of the engine.\u003cbr\u003e\n\u003cbr\u003e\nThis kick start lever is commonly used on many different brands of 50cc gas street scooters.","brand":"Monster Scooter Parts","offers":[{"title":"Default Title","offer_id":44336910303394,"sku":"E41-4892","price":6.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6943\/0690\/files\/e41-4892_7.jpg?v=1774777098"},{"product_id":"kick-start-idler-gear-50cc-gy6-scooter-engines","title":"Kick Start Idler Gear for 150cc GY6 Scooter Engines","description":"\u003cp\u003eKick start idler gear for 150cc GY6 scooter engines.\u003c\/p\u003e","brand":"Monster Scooter Parts","offers":[{"title":"Default Title","offer_id":44336912793762,"sku":"E41-4926","price":8.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6943\/0690\/files\/e41-4926_1.jpg?v=1774776418"},{"product_id":"right-crankcase-cover-gasket-honda-cn250-all","title":"Right Crankcase Cover Gasket for Honda Elite 250 (1985-1988 Models) and Helix CN250 (All Models) (OEM)","description":"\u003cp\u003eRight crankcase cover gasket for 1985-1988 models of the Honda Elite 250 (CH250) and all models of the Honda Helix (CN250). This is the stock, OEM part for the Honda Elite 250 and Helix, and will match the specifications of your original part.\u003c\/p\u003e\u003cbr\u003e\n\u003cbr\u003e\n\u003cb\u003eHonda\u003c\/b\u003e: 11394-KS4-690","brand":"Monster Scooter Parts","offers":[{"title":"Default Title","offer_id":44336918790306,"sku":"E41-5213","price":33.64,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6943\/0690\/files\/right-crankcase-cover-gasket-honda-cn250-all_1.jpg?v=1774777714"},{"product_id":"flywheel-cover-vintage-vespa","title":"Flywheel Cover for Large Frame Vintage Vespa Scooters","description":"This replacement flywheel cover for large frame vintage Vespa scooters will mount on most of those beautiful old manual transmission 2-stokers from the Golden Age of Scooterdom.\u003cbr\u003e\n\u003cbr\u003e\nJust a few of the models that used this cover:\u003cbr\u003e\n\u003cbr\u003e\n\u003cli\u003eVBA 150\u003c\/li\u003e\n\u003cli\u003eVBB 150\u003c\/li\u003e\n\u003cli\u003eVBC 150 Super\u003c\/li\u003e\n\u003cli\u003eVLA GL 150\u003c\/li\u003e\n\u003cli\u003eVLB 150 Sprint\u003c\/li\u003e\n\u003cli\u003eVNA 125\u003c\/li\u003e\n\u003cli\u003eVNB 125\u003c\/li\u003e\n\u003cli\u003eVNC 125 Super\u003c\/li\u003e\n\u003cli\u003eVNL 125 GT\/GTR\/TS\u003c\/li\u003e","brand":"Monster Scooter Parts","offers":[{"title":"Default Title","offer_id":44336956997794,"sku":"E41-9603","price":31.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6943\/0690\/files\/flywheel-cover-vintage-vespa.jpg?v=1774782800"},{"product_id":"kick-starter-shaft-for-50cc-gy6-139qmb-engines","title":"Kick Start Shaft \u0026 Gear Assembly for 50cc GY6 139QMB Scooter Engines","description":"Kick start shaft \u0026amp; gear for 50cc GY6 139QMB engines. This kick start shaft is used on a wide variety of scooters and ATV brands and models that have a Chinese built 50cc GY6 139QMB engine.\u003cbr\u003e\n\u003cbr\u003e\nPlease check the Specifications below to see if this is the correct kick starter shaft for your 50cc GY6 139QMB engine.","brand":"Monster Scooter Parts","offers":[{"title":"Default Title","offer_id":44337002447010,"sku":"E88-9533","price":6.04,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6943\/0690\/files\/e88-9533_3.jpg?v=1774790538"},{"product_id":"gearbox-brake-pin-50cc-gy6-139qmb-engine","title":"Gearbox Brake Pin for 50cc GY6 139QMB Engines","description":"56 mm long gearbox brake pin for 50cc GY6 139QMB engines.\u003cbr\u003e\n\u003cbr\u003e\nPlease check the dimensions on the Specs tab to see if this is the correct gearbox brake pin for your Chinese built 50cc GY6 139QMB engine.","brand":"Monster Scooter Parts","offers":[{"title":"Default Title","offer_id":44337002872994,"sku":"E88-9545","price":0.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6943\/0690\/files\/e88-9545_1.jpg?v=1774790475"},{"product_id":"kick-starter-gear-clip-50cc-gy6-139qmb-engine","title":"Kick Starter Gear Clip for 50cc GY6 139QMB Engines","description":"\u003cp\u003e15.7 mm outer diameter kick starter gear clip for Chinese built 50cc GY6 139QMB engines.\u003c\/p\u003e","brand":"Monster Scooter Parts","offers":[{"title":"Default Title","offer_id":44337003004066,"sku":"E88-9546","price":0.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6943\/0690\/files\/e88-9546_1.jpg?v=1774790667"},{"product_id":"rear-idler-cog-sprocket-complete-for-125cc-gy6-qmi152-157-and-150cc-gy6-qmj152-157-engines","title":"Rear Idler Cog Sprocket Complete for 125cc GY6 QMI152\/157 and 150cc GY6 QMJ152\/157 Engines","description":"Complete rear idler cog sprocket assembly for 125cc GY6 QMI152\/157 and 150cc GY6 QMJ152\/157 engines. Includes friction gear, cog sprocket, shaft, washer, pin, and spring.\u003cbr\u003e\n\u003cbr\u003e\nThis rear idler cog sprocket assembly is used on a wide variety of scooters and ATV brands and models that have Chinese built 125cc GY6 QMI152\/157 and 150cc GY6 QMJ152\/157 engines.","brand":"Monster Scooter Parts","offers":[{"title":"Default Title","offer_id":44337003430050,"sku":"E88-9554","price":6.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6943\/0690\/files\/e88-9554_1.jpg?v=1774790725"},{"product_id":"kick-starter-spindle-125cc-gy6-qmi152-qmj152-engine","title":"Kick Starter Spindle for 125cc GY6 QMI152 and 150cc GY6 QMJ152 Engines","description":"Here is our 5-1\/8\" (129.3 mm) long kick starter spindle for 125cc GY6 QMI152 and 150cc GY6 QMJ152 engines. This kick starter spindle is used on a wide variety of scooters and ATV brands and models that have Chinese built 125cc GY6 QMI152 and 150cc GY6 QMJ152 engines.\u003cbr\u003e\u003cbr\u003e\n\u003cb\u003eNote:\u003c\/b\u003e Please measure your old starter spindle's length before ordering. GY6 engines have been made for many years by numerous manufacturers and replacement components may not always be totally interchangeable.","brand":"Monster Scooter Parts","offers":[{"title":"Default Title","offer_id":44337003528354,"sku":"E88-9555","price":4.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6943\/0690\/files\/e88-9555_1.jpg?v=1774790747"},{"product_id":"starter-gear-for-125cc-gy6-qmi152-157-and-150cc-gy6-qmj152-157-engines","title":"Starter Gear for 125cc GY6 QMI152\/157 and 150cc GY6 QMJ152\/157 Engines","description":"20 tooth, 45 mm outer diameter starter gear for 125cc GY6 QMI152\/157 and 150cc GY6 QMJ152\/157 engines. This starter gear is used on a wide variety of scooters and ATV brands and models that have Chinese built 125cc GY6 QMI152\/157 and 150cc GY6 QMJ152\/157 engines.\u003cbr\u003e\n\u003cbr\u003e\nPlease check the dimensions on the Specs tab to see if this is the correct starter gear for your Chinese built 125cc GY6 QMI152\/157 and 150cc GY6 QMJ152\/157 engine.","brand":"Monster Scooter Parts","offers":[{"title":"Default Title","offer_id":44337003495586,"sku":"E88-9556","price":3.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6943\/0690\/files\/e88-9556_1.jpg?v=1774790751"},{"product_id":"150cc-gy6-scooter-go-kart-engine-crankcase-cover","title":"150cc GY6 Scooter \u0026 Go-Kart Engine Crankcase Cover","description":"Do you need a replacement a 150cc GY6 scooter \u0026amp; go-kart engine crankcase cover? The 150cc GY6 engine is a very common scooter and go-kart engine, and sports a nice black finish.\u003cbr\u003e\u003cbr\u003e\nThis case is designed for use with 10\" or 11\" diameter rear rims. \u003cbr\u003e\u003cbr\u003e Please use your rear rims to determine correct fitment.","brand":"Monster Scooter Parts","offers":[{"title":"Default Title","offer_id":44337004445858,"sku":"E88-9574","price":34.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6943\/0690\/files\/e88-9574_1.jpg?v=1774790566"},{"product_id":"6301-2rs-6301rs-bearings","title":"6301-2RS (6301RS) Sealed Scooter Wheel Bearings (Set of 2)","description":"Set of 2 6301-2RS sealed wheel bearings for gas and electric scooters. This bearing is also known as 6301RS.\u003cbr\u003e\n\u003cbr\u003e\nThis is a widely used size bearing and it can be used in various applications. Made from chrome steel, these bearings can rotate up to 15,000 RPM. Each bearing has 2 rubber seals to protect the bearing from dust or any possible contamination. Bearings are pre-lubricated with grease.\u003cbr\u003e\n\u003cbr\u003e\nThe 6301-2RS wheel bearing is an upgraded bearing to be used in place of the 6301ZZ wheel bearing. 6301-2RS bearings use rubber seals in place of metal shields for superior protection against dirt, dust, and grime, thereby increasing the lifespan of the bearings.\u003cbr\u003e\n\u003cbr\u003e\n12mm inside diameter, 37mm outside diameter, 12mm thickness.\u003cbr\u003e\n\u003cbr\u003e\nNote that 1 set is required for each wheel.","brand":"Monster Scooter Parts","offers":[{"title":"Default Title","offer_id":44337632542882,"sku":"S29-3712","price":3.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6943\/0690\/files\/6301-2rs-6301rs-bearings_1.jpg?v=1774590385"},{"product_id":"6002zz-6002z-shielded-scooter-atv-bearings-set-of-2","title":"6002ZZ (6002Z) Shielded Scooter \u0026 ATV Bearings (Set of 2)","description":"6002ZZ (6002Z) metal shielded bearings used on many scooters, ATVs, mini bikes, dirt bikes, and go karts. This is a set of two bearings.\u003cbr\u003e\n\u003cbr\u003e\nPlease check the specifications tab for detailed dimensions on these 6002ZZ bearings.\u003cbr\u003e\n\u003cbr\u003e\nChrome metal shields on both sides of the bearing shield  the inner ball bearings from the elements.\u003cbr\u003e\n\u003cbr\u003e\nThese 6002ZZ (6002Z) scooter bearings are made of chrome steel and are pre-lubricated. Ready to install.\u003cbr\u003e\n\u003cbr\u003e\nAlways replace scooter and ATV wheel bearings in sets of two.\u003cbr\u003e\n\u003cbr\u003e\nKnown markings:\n\u003cli\u003e6002ZZ\u003c\/li\u003e\n\u003cli\u003e6002Z\u003c\/li\u003e\n\u003cli\u003e6002-ZZ\u003c\/li\u003e\n\u003cli\u003e6002-2Z\u003c\/li\u003e","brand":"Monster Scooter Parts","offers":[{"title":"Default Title","offer_id":44337806016674,"sku":"X98-1254","price":5.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6943\/0690\/files\/s29-3681_1.jpg?v=1774719431"},{"product_id":"6002-2rs-6002rs-sealed-scooter-atv-bearings-set-of-2","title":"6002-2RS (6002RS) Sealed Scooter \u0026 ATV Bearings (Set of 2)","description":"6002-2RS (6002RS) sealed bearings used on many scooters, ATVs, mini bikes, dirt bikes, and go karts. This is a set of two bearings.\u003cbr\u003e\n\u003cbr\u003e\nHigh temperature plastic seals on both sides of the bearing seal the inner ball bearings from the elements.\u003cbr\u003e\n\u003cbr\u003e\nThese 6002-2RS (6002RS) scooter bearings are made of chrome steel and are pre-lubricated. Ready to install.\u003cbr\u003e\n\u003cbr\u003e\nKnown markings:\n\u003cli\u003e6002-2RS\u003c\/li\u003e\n\u003cli\u003e6002-2RS1\u003c\/li\u003e\n\u003cli\u003e6002RS\u003c\/li\u003e","brand":"Monster Scooter Parts","offers":[{"title":"Default Title","offer_id":44337806278818,"sku":"X98-1262","price":4.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6943\/0690\/files\/s29-3682_1_1.jpg?v=1774718446"},{"product_id":"6004zz-6004z-bearings","title":"6004ZZ (6004Z) Shielded Scooter \u0026 ATV Bearings (Set of 2)","description":"6004ZZ (6004Z) metal shielded bearings used on many scooters, ATVs, mini bikes, dirt bikes, and go karts. This is a set of two bearings.\u003cbr\u003e\n\u003cbr\u003e\nPlease check the specifications tab for detailed dimensions on these 6004ZZ bearings.\u003cbr\u003e\n\u003cbr\u003e\nChrome metal shields on both sides of the bearing shield the inner ball bearings from the elements.\u003cbr\u003e\n\u003cbr\u003e\nAlways replace scooter and ATV wheel bearings in sets of two.\u003cbr\u003e\n\u003cbr\u003e\nKnown markings: \u003cbr\u003e\n\n6004ZZ \u003cbr\u003e\n\n6004Z \u003cbr\u003e\n\n6004-ZZ \u003cbr\u003e\n\n6004-2Z","brand":"Monster Scooter Parts","offers":[{"title":"Default Title","offer_id":44337814438050,"sku":"X98-2053","price":4.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6943\/0690\/files\/s29-3687_1.jpg?v=1774719922"},{"product_id":"6004-2rs-6004rs-bearings","title":"6004-2RS (6004RS) Sealed Scooter \u0026 ATV Bearings (Set of 2)","description":"Set of 2 double sealed 6004-2RS series scooter and ATV bearings.\u003cbr\u003e\n\u003cbr\u003e\nThese bearings are used in a variety of applications including in wheels, transmissions, gearboxes, and various other GY6\/QMB139 engine components.\u003cbr\u003e\n\u003cbr\u003e\nThe 6004-2RS series, sometimes referred to as 6004RS, are single-row, deep groove ball bearings. Extra light in weight, they come with a 20 mm bore diameter.\u003cbr\u003e\n\u003cbr\u003e\nCheck your existing bearings for the series number, which is usually etched into the side of the bearings.","brand":"Monster Scooter Parts","offers":[{"title":"Default Title","offer_id":44337938825378,"sku":"X98-8873","price":6.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6943\/0690\/files\/6004-2rs-6004rs-bearings_1.jpg?v=1774731935"},{"product_id":"6301zz-6301z-shielded-scooter-wheel-bearings-set-of-2","title":"6301ZZ (6301Z) Shielded Scooter Wheel Bearings (Set of 2)","description":"Set of 2 6301ZZ double shielded scooter wheel bearings. Also commonly referred to as 6301Z series.\u003cbr\u003e\n\u003cbr\u003e\nShielded (ZZ or Z suffix) scooter bearings of this size are commonly used in wheels, transmissions, gearboxes, and various other GY6\/QMB139 engine components.\u003cbr\u003e\n\u003cbr\u003e\nThese single-row, deep groove ball bearings are designated as medium-weight and feature a 12 mm diameter bore hole.\u003cbr\u003e\n\u003cbr\u003e\nBe sure to check your existing bearings for the series number, which is often etched onto the outside wall of the bearing.","brand":"Monster Scooter Parts","offers":[{"title":"Default Title","offer_id":44337940267170,"sku":"X98-8878","price":6.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6943\/0690\/files\/6301zz-6301z-bearings_1.jpg?v=1774731943"},{"product_id":"50cc-139qmb-scooter-go-kart-engine-crankcase-cover","title":"50cc 139QMB Scooter \u0026 Go-Kart Engine Crankcase Cover","description":"Here is a 50cc 139QMB scooter \u0026amp; go-kart engine crankcase cover for those popular 4-stroke 139QMB engines that put the power to so many of today's 49\/50cc motor scooters. These are probably the most common scooter and go-kart engines, and many millions have been made over the years.\nTwo styles are available, the long case and the short case versions. Both sport a nice black finish.\u003cbr\u003e\u003cbr\u003e\nThe \u003cb\u003eshort case\u003c\/b\u003e engine is designed for use with 10\" diameter rear rims. This would correspond to a tire size of 2.75-10 through 3.50-10. A short case engine will not accommodate rear tires that are larger than 3.50-10.\u003cbr\u003e\u003cbr\u003e\nThe \u003cb\u003elong case\u003c\/b\u003e engine is designed to allow the use of 12\" rear rims. This would correspond to a tire size of 110\/70-12 through 140\/70-12. Please use your rear tire size to determine which crankcase cover is right for your go-kart or street-legal motor scooter.","brand":"Monster Scooter Parts","offers":[{"title":"Long Case","offer_id":44393189245090,"sku":"X98-6746-001","price":18.99,"currency_code":"USD","in_stock":false},{"title":"Short Case","offer_id":44393189277858,"sku":"X98-6746-002","price":18.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6943\/0690\/files\/x98-6746_1.jpg?v=1774839896"}],"url":"https:\/\/monstorscooterparts.shop\/collections\/street-scooters-engine-parts-crankcase-parts.oembed","provider":"Monster Scooter Parts","version":"1.0","type":"link"}