Hi all.
I'm new here and this is my first question, hope you can help.
I have a fully rebuilt Supersport motor that has a slow and very annoying oil leak from a so far unfindable source. The motor has only been run in the workshop and has no miles on it. There is evidence of a thrown chain and some dodgy welding repair so the cases are kind of suspect.
So I have sourced another set of Supersport (Black motor) cases in good condition and plan to swap all the new internals from the rebuilt motor into the new cases. My main question is do I need to measure and plastigauge all the main journals again or should the existing bearings slot right into the new cases?
In other words can I assume that all the cast cases all the same size and the bearing measurements are around crank shaft journal wear?
Any advice would be greatly appreciated.
Thanks