Wow, Rivi777...
Does your RD-350 bring back memories!
Though the Penton was the first motorcycle I ever owned, Yamaha RD's played an important role in my riding history, as the very first *street* bike I owned was a used 1973 Yamaha RD-350... Which looked like this:
Had only 1,600 mile son the clock when I got it, and even stock it was more fun to ride than sex in public! First bike I ever dropped on pavement, too, with a 30 mph slide out on a residential street going home from work... Didn't stay stock for long, ending up with expansion chambers, shocks, etc. Sold it to a good friend who rode the wheels off it for another few years...
Next RD was a 1977 I acquired while in college... Had a seized lower end from the idiot owner running it out of oil in the injection tank. Stock they looked like this:
During the rebuild it got TZ lower-end bearings, cages, and crank pins, I trued the crank for absolutely zero runout, used lighter RD350 pistons (350's and 400's had the same bore - the 400 just had a longer stroke), ported it and polished the exhausts to a mirror finish, decked the cylinders and heads, bored the carbs, ran TZ reed cages, mounted Specialist II chambers and bronze swingarm bushings along with their rearsets, put on some S&W shocks and Michelin production road race rubber, cut-down the seat, and went ridin'! The thing was a *BULLET*, and though I abused it unmercifully, it never whimpered. Sold it to another friend who rode it for years...
Later, when I had my Honda store, I ran across a truly pristine 1979 Yamaha RD-400-F "Daytona Special" that had actually been in a guy's entry hall in his house! Only had 968 miles on it (this was in 1985 or so...), and had to snap it up! Arguably these were the prettiest of all the RD family ever built... It looked like this:
I left it stock, save for some better rear shocks, and rode it quite a bit, but it was always on display with my other bikes at the shop and drew as much attention as any bike we ever had in there.
IMHO, Yamaha RD's offered possibly more bang for buck than just about any motorcycle ever made. They were vast overachievers, and taught many a rider the nuances and advantages of a great handling lightweight over a more powerful heavyweight.
Thanks, Rivi, for reminding me about how great they were!
Cheers!
Dallara