Hi, thanks for all input.
What I am trying to do is build a cb 500 bottom with 650 head and a lot of cc´s. Thats why I want to know how large liners you can fit into the cb 550/500 cylinder block. I´m sticking to wjat I have, and I dont have a 650 eninge, that wouldbe no fun at all. Its the hybrid thing I´m after. Maybe crazy or silly, but thats me.
Cheers...Per