KZ900 stock cylinder block bore?

Thanks for everyones help. Looks like the staff at Z1 Enterprizes found the information, and part numbers, I needed.

For future referrence.

The one piece oil ring was used in the early Z1900 engines. There were some issues with the one piece oil ring so later models of the 900s and the rest of the 1000s got the three piece oil ring setup.

Thanks again for all of the help and information.

Buzz