I went to get a link to where I found pistons brand new for $50 ea a few months ago but they are since no longer available. DAMN!
12111-15504 is the part number, ad -50 for .050 oversize, or -100 for .100 oversize.
now I can't find them anywhere, which sucks....Cause I have a spare cb360 motor that's locked up I was gonna try to build a crazy big-bore kit in using GR650 liners and pistons after boring the cases to fit the liners.