GY6 Cylinder Rebuild Kits Trkimal Upgrade 50mm Big Bore Kit Cylinder head assemble 69mm valve sets for 49CC 50CC 139QMB Moped Scooter Engine, Racing Performance CDI Ignition Coil Spark Plug Clutch etc

Size:69mm 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: 69mm Pacakage Included: 1 x Set of 6 Gram Racing Pure Copper Roller Weights 1 x Cylinder Head with 69mm 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

• 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
• 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
• Simple Installation
• Upgrades parts kits for most of 50cc scooter