ALso I see that your not that far away, I could just come pick them up. I live just north of marinette, It sounds like all I need is a gaskette kit right. And wouldn't I have to do a bounch of jetting and all that too if I put thoes on? Also, christmas is coming, can you come down a little, like 425,? Le me know thx.1fastxc said:Are you sure yours are spx cylinders? I wouldn't mix spx cylinders with regular ultra cylinders, the porting is different. I have a set of xcr 600 cylinders that are big bored to an 800 by HTG racing if you're interested. Everything is there for the kit, it's ready to bolt on and go. I'll sell it for $500 plus shipping, which may be cheaper than rebuilding yours by the time your done.