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Hey Guys, A friend just bought a Yamaha that appears to be an R5 or Ds7 from the picture he sent. He thought it was an RD. I was unable to find a serial number decoder to identify it for him. I thought there was a decoder here but maybe it was on the old site.
The vin appears to be 397 200976. Any help is appreciated. Thanks!

https://www.ebay.com/itm/324677369008?hash=item4b98477cb0%3Ag%3Awz0AAOSwpeNgxiAS&LH_ItemCondition=3000

https://www.ebay.com/itm/1985-Yamaha-RZ350/233959580077?hash=item367913e1ad%3Ag%3AkJAAAOSwKF9gbkgo&LH_ItemCondition=3000

https://www.ebay.com/itm/1976-Yamaha-Other/363332213956?hash=item5498499cc4%3Ag%3AhmUAAOSwsVtgP4MK&LH_ItemCondition=3000

https://www.ebay.com/itm/1979-Yamaha-Other/184713113258?hash=item2b01c26eaa%3Ag%3AOjkAAOSw%7EFFgUATH&LH_ItemCondition=3000

https://www.ebay.com/itm/1974-Kawasaki-Other/124558083835?hash=item1d003d86fb%3Ag%3AzAoAAOSw4ttgGtJ8&LH_ItemCondition=3000

https://www.ebay.com/itm/1975-Suzuki-Titan-500/164668690424?hash=item265704cff8%3Ag%3A7pwAAOSw0WdgD5gg&LH_ItemCondition=3000

https://www.ebay.com/itm/1973-Yamaha-RD350/333867836592?hash=item4dbc12e4b0%3Ag%3A4ncAAOSwZvdgDadG&LH_ItemCondition=3000

http://www.bikebound.com/2018/05/10/yamaha-rz350-cafe-racer/?fbclid=IwAR148asUbrIqCIPNUVfX8eBrlUPuQZ7QnfHBoBgoYyKsDLxfR6R23QyYdfY

https://www.ebay.com/itm/1975-Kawasaki-H2/265009210044?hash=item3db3c7a2bc%3Ag%3AnL4AAOSwTYxf-2lQ&LH_ItemCondition=3000

https://www.ebay.com/itm/1972-Kawasaki-Other/324441906874?hash=item4b8a3e9eba%3Ag%3ANLcAAOSwgsJf85mK&LH_ItemCondition=3000

https://www.ebay.com/itm/1972-Kawasaki-Other/324441906874?hash=item4b8a3e9eba%3Ag%3ANLcAAOSwgsJf85mK&LH_ItemCondition=3000

https://www.ebay.com/itm/1975-Yamaha-RD-350/164624010403?hash=item26545b0ca3:g:rmQAAOSw~pRf8nNq

https://www.ebay.com/itm/1985-Yamaha-Rz350/233827693485?hash=item36713773ad%3Ag%3AsZYAAOSwtwFf3jNT&LH_ItemCondition=3000

https://www.ebay.com/itm/1975-Yamaha-Other/124491460123?hash=item1cfc44ee1b%3Ag%3ACm4AAOSwB7pf2%7EOR&LH_ItemCondition=3000

https://www.ebay.com/itm/1975-Yamaha-Other/333826037750?hash=item4db99517f6%3Ag%3AjnAAAOSwaspf2ONN&LH_ItemCondition=3000

https://www.ebay.com/itm/1975-Yamaha-RD350/274606500015?hash=item3fefd2a8af%3Ag%3AAnoAAOSwzPlf0CtO&LH_ItemCondition=3000

https://www.ebay.com/itm/1986-Suzuki-RG500-Gamma/143819873146?hash=item217c551b7a%3Ag%3A8ykAAOSwPitfoJsg&LH_ItemCondition=3000

https://www.ebay.com/itm/1978-Yamaha-Other/303745672831?hash=item46b8a7267f%3Ag%3AX18AAOSwOopfmzq7&LH_ItemCondition=3000 

I see that the R5 has the same part number as the rd350's & 250's. (Seatpan) Is there any other model(s) that would interchange? Thanks