Excellent. I'll give them a try. Their site came up on google, but it wasn't very specific about the kind of work they do...Like I was saying, I have a 550 that I'm re-building and am going to try and fit some 60mm pistons from a edit: (kawasaki) gpz600. The standard bore for the 550 is 57.5, so there is some work to be done to fit them. I'll give those guys a call next week...Thanks for the reference.