I have cylinders w/o sleeves, 2 sets of sleeves, head with domes. no pistons, union bay does not have pistons. you will need to find pistons that will work and the cylinders are as they came out of the cnc machine. no porting. if interested pm me and we can work out a deal. I thought about building it but I don't have the cash so I would rather sell it for a great deal and let some one else have some fun. union bay does not have parts for this motor and have discontinued it. do not call fastrax to see if you can get pistons. thanks