Turn your GY6 150cc into a 175cc screamer!

Installation requires crankcase to be split and professionally machined. We offer send-in case machining services in our machining services catalog.

See our other replacement and big bore kits

• Requires Case Machining
  

• 62mm Cylinder
  

• 62mm Piston, pin, clips & rings
  

• Head gasket and Base gasket

Send us your case and we will bore it out for you!  Click here for details