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 Size:64mm Valve Length

Fitment:
Jonway 49cc 50cc 4 stroke scooters like warrior 50
50cc 4 stroke like Agility 50,People S50 4T,Suer 8 50 4T Pagsta mini 49cc
Baja 49cc 50cc 4stroke scooters like motorsports SC-50 sun city,primo,DR50,Dirt Runner 49
Baotian 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
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
Many more GY6 4-stroke 49cc 50cc 60cc 80cc from china. engine

Specifications:
Bore: 50mm
Displacement:100cc
Valve Length: 64mm

Pacakage Included:
1 x Set of 6 Gram Racing Pure Copper Roller Weights
1 x Cylinder Head with 64mm valve with Update Camshaft.
1 x Rocker Arms Assembly
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, and Exhaust locking hat
1 x 6pins Racing AC CDI
1 x Racing Ignition Coil
1 x Racing 3-electrode A7TC Spark Plug
1 x Set of Clutch Small Racing Spring
1 x Racing Clutch Big Spring