Paging Hog

What overbore is your RD400 on?

Reason I ask is there's a pair of brand new genuine Yamaha/ART +.25mm
RD400D[1]pistons sitting on my desk that I've been using as paperweights
for god knows how long, and I thought they might be of use to you.
They'll need rings, gudgeon pins and circlips cos genuine parts don't
come as a set.

Yours for the taking if they're any use to you.

[1] Round transfer holes, not square like the E and 350LC variety.