Upgrade Big Bore 50mm Cylinder Rebuild Kit for GY6 50cc 139QMB Racing Scooter Parts 64mm Valve Scooter Moped ATV Go Karts

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 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 package Included: 1 * cylinder head comp 1 * cylinder body 1 * piston 1 * piston pin 1 * piston ring 2 * pin clip 2 * valve rockers 1 * oil pump 1 * oil sprockets 1 * the whole gaskets 6 * roller 4 * Bolt

• 【Fit for 】 Upgrade GY6 50cc 4-stroke 139QMB engines
• 【Specification】Cylinder bore:50mm, Cylinder head:50mm, Piston pin:13mm, 64mm valve, it will make the GY6 50cc engine more power to climb hill.
• 【Parts included】Cylinder head comp, cylinder body, piston, piston pin, piston ring, pin clip, valve rockers, oil pump, oil sprockets, the whole gaskets, roller, Bolt.
• 【Quality Guarantee】Please feel free to contact us, if you have quality or using problem, we will reply in 24 working days, customer 100% satisfied shopping experience will be our first goal.