In my experience , I've only have delt with 115 rod 10 mil cranks in wich it seems that it's getting harder to get pistons for that rod size on the bigger bores meanin 73.50 and up (not saying there isn't , like a 250 R piston) , but seems like those Kawasaki pistons lew uses are meant more for the 120/125 rod and there is way more availability , but that's just my expirience , usually I just run T. rex cilinders wich in most cases have a lot in comon w the twisters , also a&s does a great job porting , but from what I've heard LC performance is the way to go on these type of cilinders , not knocking or amping anyone down or up as I have never dealt with them , we have a couple of twister and T. rex setups and they haul ass , I've seen how much material you need to take out ( port) to make em run real good , we also do a diferent porting figure to the piston than I have seen other people do , just my 2 cents I'm pretty Shure ho ever or whatever you end up , your gonna be pretty happy , gl