this is a nice little piston kit we have been using for some time now with zero issues. NOS pistons are becoming tough to find and Honda never offered them as a kit so you have to hunt for all the individual parts . we found a company making complete kits  pistons are cast aluminum just like oem and we have used them a lot with zero issues, kit will come with piston, ring set ,wrist pin and 2 clips.  I stock all sizes from the standard bore of 50mm through 51.50 mm make sure you measure the cyl you have and compensate how much material will need to be removed to clean it up . we also offer full machine shop service to bore and hone your cyl . 

NOTE !! 

Piston ring installation goes as follows  top two rings are numbered 1 and 2 look for the markings  1 is on top with markings facing up and 2 is second with markings facing up   oil control rings are just like normal spring first then install your upper and lower control ring make sure you stager the joints