He says Hohn @Economy did the top end.
1973 Yamaha RD350
https://tulsa.craigslist.org/mcy/d/tulsa-1973-yamaha-rd350/7610512373.html
Fine example of a 73
pretty nice. looks like a replacement wiring harness, routed incorrectly. also the tell tale signs of wd-40 in the bottom of the tach hole due to the oil ring around the gauge screws. super minor stuff, for sure, but still there. IMHO, prob a bit high on asking but its nice.
yes that thing brings back memories of my 73. really nice.