1. GY6 50cc 100cc 20mm big bore carburetor replacement for 139QMB 139QMA Scooter Moped ATV engine carb.. 2. Product specification Intake side inner diameter 20mm, Intake side outer diameter 28mm, Air filter mount inner diameter 35mm, Air filter mount outer diameter 39mm.. 3. Easy to install, no complicated tools required, save time and effort.. 4. Better fuel to air ratio the carburetor improves the injector to have better starting, idling, and performance .. 5. Our inspectors will inspect all the products again before they are dispatched to guarantee all customers receive good products..

Designed For Scooters - This engine kit is made for scooters with 139QMB and 49cc and 50cc GY6 engines. It comes with a 50mm cylinder block with 90cc displacement, a racing AC CDI, and A7TC spark plugs.. Power Into Overdrive - Designed to boost and enhance a scooter's horsepower, as well as torque for better acceleration. The larger size allows for increased combustion and burning of air and fuel.. Built To Last - Choose mod parts you can trust. This big bore kit for 49cc scooter's piston rings are made from alloy while the piston is made from aluminum. The cylinder is crafted out of strong steel.. No Frills Installation - Installing and setting up this 49cc bore kit is a breeze. The package includes a detailed and easy-to-follow instruction manual to help you through the installation process.. We Got Your Back - We stand by the quality of our products. If you're not satisfied with the performance of the kit, contact us to avail of our no questions asked 1-year replacement warranty..

This big cylinder kit will upgrade your gy6 50cc 60cc 80cc to 100cc, without EGR, to get more RPM,more power, faster maximum speed.. 69mm valve length version. Simple Installation. With cylinder body kits, cylinder head kits, camshaft, camshaft seat kits, gaskets kits, oil pump and gear, spring sets, copper roller sets, 6pins racing AC CDI, ignition coil and racing 3-electrode spark plug. Upgrades parts kits for most of 50cc scooter.

1.Please note this kit is only used for GY6 139QMB 4-Stroke Engine.. 2.Inner Diameter of Cylinder 50mm. 3.Outer Diameter of Piston Pin 13mm. 4.Include Cylinder,Piston,Piston Ring,Piston Pin,Piston Pin Clip,Valve Oil Seal,Gaskets,Tensioner Gasket,Exhaust Gasket,IntakeExhaust Studs,Exhaust Nut. 5. High Performance Upgrade 50mm Cylinder Rebuild Kit for GY6 49cc 50cc 60cc 80cc 100cc engine.

This big cylinder kit will upgrade your gy6 50cc 60cc 80cc to 100cc, without EGR, to get more RPM,more power, faster maximum speed.. 64mm valve length version. Easy Installation. Upgrade engine parts included cylinder body kits, cylinder head kits, camshaft, camshaft seat kits, gaskets kits, oil pump and gear, clutch spring sets, copper roller sets, 6pins racing AC CDI, ignition coil and racing 3-electrode spark plug. Upgrades parts kits for most of 50cc scooter.

This kit can be only used for GY6 139QMB 4 Stroke Engine.. Inner Diameter of Cylinder 50mm,Outer Diameter of Piston Pin 13mm. Upgrade your engine from 50cc to 100cc. Your vehicle will get more power with this item,easier to climb hill than ever before. 12 months warranty, please feel free to message us via Amazon system email for any concern.

Use Large Valve Heads to Get More Power for Your GY6 139QMB 139QMA 147QMD Scooter ATV Go Kart Engine. This Big Bore Rebuild Kit Comes with 18.520.5mm Large Valve Cylinder Head Assy Stock is 1618.5mm.. Compatible with 69mm Long Valve Style Heads. If your Original Head Has 64mm Valves, Please Must Change Your Rocker Arms with The Ones in Our Kit.. Glixal Piston Rings DLC Wear Resistant Coating. This Coating will Also Reduce the Friction Coefficient to Protect the Cylinder Sleeve.. Please Note The Engine Side Cover Gasket is for a Short Case Version 8 Bolt.. Attention AT marking face to the piston, the 6mm small hole goes up or away from the Motor .

Cylinder Kit 100 brand new replacement cylinder kit, Durable Material Made Of Metal Cylinder diameter 50mm ID.. NOTE Not included installation instructions, professional installation is always recommended.. High matching It could correctly replace the original quality part.. Fitment For 139QMB and 1P39QMB GY6 50cc 4 Stroke Chinese Scooters.. After-sales Service Sometimes the carrier is not very good at taking care of our packages, so it may cause some damage in transit. If there is any damage to the product you receive, please contact us at any time, and KANING will do our best to solve for you..

Please note this kit is only used for GY6 139QMB 4-Stroke Engine.. Package Include1 x 50mm Cylinder 1 x 13mm Piston 1 x Pin 2 x Circlips 2 x Gaskets 5 x Rings. Fitments GY6 100cc Chinese Scooter Engine Conversion. Replacement for original part.Please check part comparibility to see if it fits your model.. Arrival within 6-15 business days.

Designed For Scooters - This engine kit is made for scooters with 139QMB and 49cc and 50cc GY6 engines. It comes with a 50mm cylinder block with 90cc displacement, a racing AC CDI, and A7TC spark plugs.. Power Into Overdrive - Designed to boost and enhance a scooter's horsepower, as well as torque for better acceleration. The larger size allows for increased combustion and burning of air and fuel.. Built To Last - Choose mod parts you can trust. This big bore kit for 49cc scooter's piston rings are made from alloy while the piston is made from aluminum. The cylinder is crafted out of strong steel.. No Frills Installation - Installing and setting up this 49cc bore kit is a breeze. The package includes a detailed and easy-to-follow instruction manual to help you through the installation process.. We Got Your Back - We stand by the quality of our products. If you're not satisfied with the performance of the kit, contact us to avail of our no questions asked 1-year replacement warranty..

1.Inner Diameter of Cylinder bore 50mm, Outer Diameter of Piston Pin 13mm. 2.Outer Diameter of Piston 50mm. 3.Easy installation, Upgrade your engine from 50cc to 100cc with more power to climb hill. 4.Include Cylinder,Piston,Piston Ring,Piston Pin,Piston Pin Clip,Valve Oil Seal,Gaskets,Tensioner Gasket,Exhaust Gasket,IntakeExhaust Studs,Exhaust Nut.