171Cc Gy6 Big Bore Kit – 57Mm Stud Spacing, High-Performance Build

Description

If you have GY6 150cc B motor (57mm stud spacing) and want to upgrade the power, this 171cc big bore kit is the ticket! The piston ring gaps have been measured and installed into the cylinder to make install a breeze! Kit includes: cast piston, rings, piston pin, cylinder and gaskets.

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