Scooter Big Bore Kit 100cc 50mm QMB139 GY6 Scooter Performance Parts Stainless

  
Scooter Big Bore Performance Kit, Fits The QMB139/GY6 Based 50cc Four Stroke Chinese Scooter Engines. This is a 50mm Bore, Comes Complete with Cylinder, Piston Set, Gaskets, Complete Head Already Assembled (64mm Valve Length), Performance Air Filter, Performance A 9 cam, Performance Variator with 6.5 Gram Roller Weights, 50cc 20mm carburetor, #80, #85, #90 carb jets for fine tuning your engine Very Nice Performance. Exhaust , (64mm) Rocker arms, Performance CDI Box , Intake spacer, o ring , Fuel filter, Ignition Coil , Fuel Valve, 2000 rpm torque springs.