As informed by engineer as follows:
The old crankcase as previously informed is no longer available and replaced to a new crankcase P/n: E5360101305 .
There has been a change in the design for the piston and liner due to the implementation of the carbon scrapper rings hence the change of the liner and piston parts to suit the new design. These changes do not affect the performance of the overall engine.
The old crankcase has been obsolete a long time ago so it’s no longer deliverable .
Hope these explanations are able to clarify RTN questions.
Thank you.