![Amazon.com: GY6 Cylinder Rebuild Kits Trkimal 47mm 80cc Big Bore Upgrade Kits for 49cc 50cc 139QMB Engines 64mm Valve scooter moped parts, GY6 Engine parts for Chinese Scooter(64mm Valve Length) : Automotive Amazon.com: GY6 Cylinder Rebuild Kits Trkimal 47mm 80cc Big Bore Upgrade Kits for 49cc 50cc 139QMB Engines 64mm Valve scooter moped parts, GY6 Engine parts for Chinese Scooter(64mm Valve Length) : Automotive](https://m.media-amazon.com/images/I/71-3rXgIVSL.jpg)
Amazon.com: GY6 Cylinder Rebuild Kits Trkimal 47mm 80cc Big Bore Upgrade Kits for 49cc 50cc 139QMB Engines 64mm Valve scooter moped parts, GY6 Engine parts for Chinese Scooter(64mm Valve Length) : Automotive
![Amazon.com: 80cc Big Bore Kit Cylinder 69mm Head Piston Rings Chinese Scooter 50cc GY6 QMB : Automotive Amazon.com: 80cc Big Bore Kit Cylinder 69mm Head Piston Rings Chinese Scooter 50cc GY6 QMB : Automotive](https://m.media-amazon.com/images/I/71mkRuQHhUL.jpg)
Amazon.com: 80cc Big Bore Kit Cylinder 69mm Head Piston Rings Chinese Scooter 50cc GY6 QMB : Automotive
![Amazon.com: Cylinder and Head 61mm Alloy Big Bore Kit GY6 150cc Scooters Mopeds Performance : Automotive Amazon.com: Cylinder and Head 61mm Alloy Big Bore Kit GY6 150cc Scooters Mopeds Performance : Automotive](https://m.media-amazon.com/images/I/41YidtYOmfL._AC_SY580_.jpg)
Amazon.com: Cylinder and Head 61mm Alloy Big Bore Kit GY6 150cc Scooters Mopeds Performance : Automotive
![Amazon.com: RUTU 64mm Valve GY6 Big Bore Kit 100cc,with 6pin Racing CDI Ignition Coil,Compatible with Big Bore Kit for 49cc, 50cc & 139QMB Scooter Engines - 50mm Cylinder Block, 90cc, Boosts HP Amazon.com: RUTU 64mm Valve GY6 Big Bore Kit 100cc,with 6pin Racing CDI Ignition Coil,Compatible with Big Bore Kit for 49cc, 50cc & 139QMB Scooter Engines - 50mm Cylinder Block, 90cc, Boosts HP](https://m.media-amazon.com/images/I/51RmSvJxOkL._AC_SY580_.jpg)
Amazon.com: RUTU 64mm Valve GY6 Big Bore Kit 100cc,with 6pin Racing CDI Ignition Coil,Compatible with Big Bore Kit for 49cc, 50cc & 139QMB Scooter Engines - 50mm Cylinder Block, 90cc, Boosts HP
![Amazon.com: BBR Motorsports Replacement Parts - Piston Kit - For 88cc FTP Bore Kit - Honda XR/CRF50 2000-Up : Automotive Amazon.com: BBR Motorsports Replacement Parts - Piston Kit - For 88cc FTP Bore Kit - Honda XR/CRF50 2000-Up : Automotive](https://m.media-amazon.com/images/I/518HOoVFAWL._AC_SY350_.jpg)
Amazon.com: BBR Motorsports Replacement Parts - Piston Kit - For 88cc FTP Bore Kit - Honda XR/CRF50 2000-Up : Automotive
![Amazon.com: 67mm Engine Parts Big Bore Cylinder Piston Gasket Kit Replacement Set for CG250 250cc Air Cooled Vertical Engine Chinese ATV Dirt Bike Engine USA Stock (Silver) : Automotive Amazon.com: 67mm Engine Parts Big Bore Cylinder Piston Gasket Kit Replacement Set for CG250 250cc Air Cooled Vertical Engine Chinese ATV Dirt Bike Engine USA Stock (Silver) : Automotive](https://m.media-amazon.com/images/I/41QqNz-2pJL._AC_SY580_.jpg)
Amazon.com: 67mm Engine Parts Big Bore Cylinder Piston Gasket Kit Replacement Set for CG250 250cc Air Cooled Vertical Engine Chinese ATV Dirt Bike Engine USA Stock (Silver) : Automotive
![Amazon.com: WKhang 97cc 50mm Big Bore Cylinder Kit for Honda CT70H TRX70 XR70R CRF70 CT70 TRX 70 Suzuki, dayang, Yamaha Series air - Cooled, Water - Cooled, Scooter, Tricycle Series (85CC), Black(does Amazon.com: WKhang 97cc 50mm Big Bore Cylinder Kit for Honda CT70H TRX70 XR70R CRF70 CT70 TRX 70 Suzuki, dayang, Yamaha Series air - Cooled, Water - Cooled, Scooter, Tricycle Series (85CC), Black(does](https://m.media-amazon.com/images/I/51L6LcdMD7S._AC_UF894,1000_QL80_.jpg)
Amazon.com: WKhang 97cc 50mm Big Bore Cylinder Kit for Honda CT70H TRX70 XR70R CRF70 CT70 TRX 70 Suzuki, dayang, Yamaha Series air - Cooled, Water - Cooled, Scooter, Tricycle Series (85CC), Black(does
![MYK 125cc/150cc to 155cc Big Bore Cylinder Kit 58.5mm, Compatible with Scooters GY6 157QMJ : Automotive - Amazon.com MYK 125cc/150cc to 155cc Big Bore Cylinder Kit 58.5mm, Compatible with Scooters GY6 157QMJ : Automotive - Amazon.com](https://images-na.ssl-images-amazon.com/images/I/41VNHLWkxCL._AC_UL600_SR600,600_.jpg)
MYK 125cc/150cc to 155cc Big Bore Cylinder Kit 58.5mm, Compatible with Scooters GY6 157QMJ : Automotive - Amazon.com
![Amazon.com: Mtanlo 52mm Big Bore Cylinder Piston Carburetor Overhaul Kit for Husqvarna 266XP 266 266SE XP SE 61 Parts Chainsaw Intake Spacer Manifold Adaptor Gasket Set with Decompression Valve : Patio, Lawn Amazon.com: Mtanlo 52mm Big Bore Cylinder Piston Carburetor Overhaul Kit for Husqvarna 266XP 266 266SE XP SE 61 Parts Chainsaw Intake Spacer Manifold Adaptor Gasket Set with Decompression Valve : Patio, Lawn](https://m.media-amazon.com/images/I/51PE7EyxZ8L._AC_SY580_.jpg)
Amazon.com: Mtanlo 52mm Big Bore Cylinder Piston Carburetor Overhaul Kit for Husqvarna 266XP 266 266SE XP SE 61 Parts Chainsaw Intake Spacer Manifold Adaptor Gasket Set with Decompression Valve : Patio, Lawn
![Amazon.com: GOOFIT Performance Big Bore Cylinder Kit GY6 80cc 47mm for 139QMB ATV Scooter Moped Go Kart : Automotive Amazon.com: GOOFIT Performance Big Bore Cylinder Kit GY6 80cc 47mm for 139QMB ATV Scooter Moped Go Kart : Automotive](https://m.media-amazon.com/images/I/41wD0HqYTML._AC_SY580_.jpg)