i have a set of vitos pistons 68mm for 4mil long rod, which from their website states u can use on cub also. one is brand new and the other one has less than 30 min on it you can still see the coating the piston comes with.
i have a vitos stealth cylinder kit but when i was breaking it in the filter came off and i didnt notice and it hurt the piston on the left side. so i went ahead and just ordered a new piston
but one of my builders suggested a different setup and i ended up going with some asm's
i went ahead and bought brand new rings for the other piston also so its pretty much fresh
i can send pics on demand just let me know ur email
$140 shipped