Complete piston kit to rebuild the top end of a Honda XR75. Standard bore on the 4-speed mode was 47.00mm. Kit comes with new, 10:1 compression piston, rings, piston pin, and circlips. Choose 0.50mm oversize (47.50mm) or 1.0mm oversize (48.00mm) from options. Compression is moderately increased from stock pistons, but not high enough to need any modifications to other combustion parts.
Have your cylinder measured by a professional! This is not a big bore kit. To install this you will likely require a bore and hone of your cylinder.