Description:

The GY6 80cc Big Bore Upgrade Kit is a comprehensive cylinder rebuild set designed to increase engine performance for 49cc and 50cc 139QMB engines. This kit provides a significant power boost for most Chinese scooters, ATVs, and go karts.

• Bore Size: 47mm
• Displacement: 80cc
• Valve Length: 69mm
• Cylinder Type: Non EGR Cylinder
• Compatibility: Fits GY6 4 stroke 49cc, 50cc, 60cc, and 80cc engines
• Compatible Brands: Roketa, Sunl, Baja, Taotao, Panterra, Redcat, Tank, Giovanni, Wildfire, Xtreme, Seaseng, Qlink, Yiben, Jonway, Jmstar, Vento, Baotian, Dotera, Eton, Fly, Jalon, Jinlun, Sinski, SSR, Verucci, VIP, Zhong Hu, Zongshen
• Included Components:
  • Cylinder Head with 69mm valve
  • 47mm Bore Cylinder Block
  • Piston Assembly with Piston, Rings and Wrist Pin
  • Full Engine Gasket Set
  • 6 pins CDI
  • Ignition coil
  • 4 pin AC regulator
  • Relay
  • A7TC Spark Plug
  • Intake Manifold and Muffler Bolts with Exhaust locking hat
  • 8.5 Gram roller set
  • 69mm Rocker Arms
  • Valve Seals
  • Oil Pump Assembly with Driving Gear
  • Camshaft and Camshaft chain 82
  • Belt 699 18 30
  • Chain adjuster
  • Oil screen, spring, cover and oil seal
  • Starter clutch
  • Intake manifold
  • Kick Starter Start Shaft Idle Gear Spring