Wingsmoto 100cc Big Bore Kit for 64mm Valve GY6 49CC 50CC 139QMB Moped Scooter Engine 50mm Bore Upgrade Set with Racing CDI Ignition Coil Performance Spark Plug (64mm Valve Length);

Fitment: 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
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 engine

Specifications:
Bore: 50mm
Displacement:100cc
Valve Length: 64mm
Pacakage Included:
1 x Cylinder Head with 64mm valve, WITHOUT camshaft, you have to use your stock one.
2 x Rocker Arms for 64mm Valves
2 x Valve Seals
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 7 Gram Racing Roller Weights
1 x Racing AC CDI
1 x Racing Ignition Coil
1 x Racing 3-electrode A7TC Spark Plug