(not mine)
nice looking bike
1977 Yamaha RD400D
https://bringatrailer.com/listing/1977-yamaha-rd400d/
True two stroke cognoscenti only ride Cheng Shin Barracudas:)
Certainly nice and clean tho.
Maybe not "proper", but I'd rather ride fairly new Cheng Shins than 20 year-old 'Stones.
I just thought it amusing that they were so specific about something that is not necessarily desirable vs. the typical "new tires and tubes"
Unfortunately, most of these bikes get hidden away and sit but I guess that is the fate for alot of motorcycles.
Sold for $8,000 on 8/2/22