RD 400 +2mm Stock Pistons

[Milan]

Did not know Yamaha had made these this big?

Rings - 1A1-11610-80 ???

https://www.ebay.com/itm/304687614952?hash=item46f0cc0be8:g:Z2UAAOSwc~JjZE5Q&amdata=enc%3AAQAHAAAAoLZzBLAeKRijaRERfVT%2Bo4xwIeUR2%2F8wLNvhfKuI8lQoWgYxqE3myKke2Tv8nzm5SnOvJMgL5ZwYFNf3LsAJdc3pRqrjbyiH%2BLzMawUOVOfnTQ7SrszYAfcRanznjxpKVZjX2NeoouasQ43pdITalf9QaLcIaiyBDxgkJFkawIDQsjAE%2Fm2QXP0OA5VHiH0BsX1IsKJE2gyRNHwCmgnB4Rs%3D%7Ctkp%3ABk9SR77D8NmzYQ

[SoCal250]

That's because they aren't OEM Yamaha

[m in sc]

yeah, not even close.

[Milan]

I agree with the above

Whats with the OEM " Looking " part number the guy put for the rings.

Make it seems like he trying to fool buyers.

M

[SoCal250]

I think the manufacturer may have put those part numbers on there. That part number is a make believe number.
None of that packaging is OEM Yamaha and there are no Yamaha logos on any of it. The ring bags look very similar to the vintage Tucker Rocky stuff. The "1A100" in the skirt casting is something that was done by some manufacturers for fitment reference even though they were not OEM parts.

I doubt the seller is trying to pull anything, Matt is a very respected RD/RZ vintage parts dealer. He doesn't claim in the ad that they are OEM, simply that they are NOS.

[dgorms]

I've dealt with Matt, he's pretty straight up.

[vinyas]

Those are cruzinimage piston, quality is decent but not Yamaha OEM

Matt is a reliable seller, his item description are spot on and packs stuff well