Sent cr250 RA 1980 barrel away for nikasil plating, supplied Genuine Honda piston for sizing{ 70mm} but now realise I have only the Genuine Honda rings for Chrome Bore????
where can I find rings for Nikasil bore that will match Honda piston{ring thickness, ring locating ends to match etc }Thanks Mark Birkett. PS,, have tried Wiseco 70mm piston but a bit Snug, would have to Hone cylinder for correct clearance.