i am building one with zx9 pistons, gives 850. regretfully it will not result in as high compression as i'd like but considering pistons cost all of 50 euro (for the 4 of them ) nice return on investment. comp height is lower by about 2mm, so gonna get it back from milling the block, no biggie. actually project is on hold exactly at that point: bigger sleeves are already installed and bored (off a 89-90 750), "just" need to do a dry build to nail the exact dim to mill down the block. project on hold due to vintage road racing duties let me know if you need more info.
