RD400C piston cylinder clearance

[4spot]

Hi all
I'm going through my stash of parts for my RD400 build and I have some cylinders that were bored oversize. I need to confirm the measurements but I suspect (based on a note with them) that they were bored to 0.0015"/0.038mm clearance. Is this an ok number for stock cast pistons?

Internet and manuals seem to differ

[midlifecrisisrd]

The actual clearance should be what the manufacturer of the piston it was bored for recommends

Steve

[arrow]

That's the correct clearance for the genuine (ART) pistons.