RUTU 69mm 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 & Speed 5-10mph

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RUTU 69mm Valve GY6 Big Bore Kit 100cc,with 6pin Features

• 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.

About RUTU 69mm Valve GY6 Big Bore Kit 100cc,with 6pin

Valve Length: 69mmApplication Baja 49cc 50cc 4stroke scooters like motorsports SC-50 sun city,primo,DR50,Dirt Runner 49 Biaotian BT49QT-2,BT49QT-7,BT49QT-9,BT50QT-9,BT50QT-11 Dotera 50QT-11 Eton 49cc 50cc 4stroke like Sport 50 Fly 49cc 50cc 4-stroke scooters Jalon JL50QT-15,JL50QT-16,JL50QT-18,JL50QT-21,JL50QT-21 Falcon Jinlun 49cc 50cc 4-stroke scooters Jonway 49cc 50cc 4 stroke scooters like warrior 50 Kymco 50cc 4 stroke like Agility 50,People S50 4T,Suer 8 50 4T Pagsta mini 49cc Roketa 49cc 50cc 4 stroke scooter such Bahama,Maui,Sicily,Tank,Baotian 50QT-9 Sinski XSJ50QT-6, XSJ50QT-B SSR Lazer 5 Moped Sunl SL50QT-16, SL50QT-18,SL50QT-2,SL50QT-3 Tank 49cc 50cc 4-stroke scooters Taotao 49cc 50cc 4 stroke scooter such as GT5,Fastwind,AMT50-A1,CY50-A,CY50-B,CY50-T3,Funny50,Roman 50,Retro 50,Speedy50,Venus50 Verucci VC50TS-3M VIP future champion 4 stroke Zhong Hu 50cc,Zongshen Metro 50cc Zongshen ZS50QT-4 and many more GY6 4-stroke 49cc 50cc 60cc 80cc 139qma and 139qmb engineSpecifications: Bore: 50mm Displacement:100cc Pacakage Included: 1 x Cylinder Head with 69mm valve, WITHOUT camshaft, you have to use your stock one. 2 x Rocker Arms for 69mm Valves 1 x Oil Pump Assy with Driving Gear 1 x 50mm Bore Cylinder Block 1 x Set of 50mm Piston Assy, Piston, Rings and Wrist Pin 1 x Full Set of Engine Gasket 1 x Set of Intake Manifold and Muffler Bolts 1 x Set of 4 Gram Racing Roller Weights 1 x Set of 5 Gram Racing Roller Weights 1 x Racing AC CDI 1 x Racing Ignition Coil 2 x Racing A7TC Spark Plugs