RE: MVVS 2.5D RRV
I located a piston and liner for a current spec 2.5D. They fit the above engine perfectly.
Porting and timing in the new liner is a little different. I ended up leaving in the old liner. It must not be overly worn as the new piston makes a nice gas seal using it.
The old conrod was unbushed. Both little and big ends were worn. The current spec conrod (supplied fitted to the piston in th enew P&L set) is sturdier, and bronze bushed on the big end.
All fitted up with no issues, except I made a thicker back plate gasket to stop the crank pin binding on the disc valve. Valve clearance is good, no scores on the mating faces.
It's looking good.