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Big Bore Kit 50mm 82cc for GY6 50cc 139QMB

Categories: Honda GY6 50cc KYMCO KAWASAKI scooter ATV, Honda GY6 125 150, Honda GY6 50cc 139QMB KYMCO SYM ...etc

  • USD
  • $65.00
  • Shipping:$28.00


Big Bore kit 82cc 50mm bore size  for  GY6 50cc Cylinder upgrade kit

include : 50mm cylinder , Piston Kit , Gaskets

will fit to following GY6 & 139QMB 50cc base engine

Kymco: Freeway 50,Filly 50cc,Agility 50cc

Taishan:Sport 50cc,Commuter 50cc





and other Chinese Cloned GY6 base 50cc engine  

**** for engine code with "QJ"139QMB engine code

include following Brand:


VENTO, Roketa, Baja Motorsports, Kazuma....etc


you have to modify engine case to 56mm for this big bore kit.****

if you dont know your engine model,

You can check your engine serial number


the number stamped on engine case near engine mount











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