(not mine)
Looked up the current record on the AMA site and it's 128.345 mph for this bike. Our late esteemed member Mark Atkinson still holds the 500-M-AG record at 140.723 (saw his name in the list)
The eBay listing would probably benefit with a better description and marketing. I did a little online digging and came up with this: https://www.contimotousablog.com/continental-conticlassicattack-bonneville-speed-record/
(story says it's a '77 model)
1976 RD 400
https://www.ebay.com/itm/135737631593
"RD holds the current AMA 500-M-CG landspeed record set at Bonneville. Has clean FL title. Won best motorcycle of show at festival of speed, the one show it was entered. Vape CDI no battery needed for spark. JL SS pipes ceramic bearing crank, trans and wheels by World Wide Bearings. Has working high and low headlight, tail light, brake light. 3.5" longer swingarm. Hand built seat and tail out of aluminum. Motor was built for Bonneville but with street riding in mind. Top mph at Bonneville 131. At sea level on hard road not the salt, bike will run 145. Bike could set class fuel record as it sets. Central Florida. Enough spares to build extra engine with spare cylinder ported and bored matching cylinders on bike."
rd400_ls_fl.jpg
rd400_ls_fl2.jpg
all that,.. and rfy shocks. :whatever: actually not a terrible deal. lots of good stuff there.