Turns out these pistons are total crap. They were machined wrong. On two of the pistons there is a height difference of .010 from one side of the piston to the other. So these are pretty much scrap. And the guy that used to make them I think may have died. Maybe i can use them as a bigbore on a CB125. Now I have to buy new pistons. $$$$

Gentleman's Express

There was an article back when on how to make your CB550 faster and handle better while still looking stock. Good article but the best part is the Diagram for modifying a CB750 piston to fit a 550 making it a 592 is in there. If anybody makes a set of pistons based off these plans let me know. I would appreciate a set.