Brand new 80CC BBK BIG BORE KIT for Chinese 4 stroke Scooters & Mopeds Upgrade GY6 49cc 50cc to 80cc

The best way to get more RPM. We don't add in useless part to make the BBK looks fat, all parts in our BBK are the best out there to increase your top end performance. Some people prefer 80cc over 100cc big bore kit due to its longer durability.

Big Bore kit includes

• Fully assembled cylinder head
  
• 69mm high lift valves, best performance valves
  
• 69mm high lift rockers, best performance rockers
  
• Cylinder body
• Cylinder head gasket set
• 3 up-sized main jets and matching pilot jets to upgrade your existing carb, no need to purchase bigger carb
  
• A9 high performance camshaft best performance combo with 69mm set up
  
• Piston & Rings set
• 69mm high lift camshaft holder
• Manifold

Bore kit works with:

• Roketa 49cc 50cc 4 stroke scooters such as Bahama, Maui, Sicily, Tank, Baotian 50QT-9
  
• Taotao 49cc 50cc 4 stroke scooters such as GT5, Fastwind,  atm50-a1, cy50-a, cy50-b, cy50-t3, funny 50, Roman 50, Retro 50, Speedy 50, Venus 50
  
• SUNL 49cc 50cc 4 stroke scooters
• VIP future champion 4 stroke
• Jonway 49cc 50cc 4 stroke scooters such as warrior 50
  
• Baja 49cc 50cc 4 stroke scooters such as motorsports SC-50 sun city, primo
  
• Zhongshen ZS50QT-4
  
• Baotian BT49QT-2, BT49QT-7, BT49QT-9, BT50QT-9, BT50QT-11
• Fly Scooter 49cc 50cc 4 stroke scooters
• Tank 49cc 50cc 4 stroke scooters
• Jinlun 49cc 50cc 4 stroke scooters

Multiple items can be combined shipping, please look at our other items, thank you.