I know you guys are probably somewhat biased towards the SOHC Hondas, but I got an even trade offer today for a '72 Yamaha R5 with a freshly rebuilt RD350 top end (still in break in period).
It has 18k miles, my 550 has 32k miles (engine has never been opened).
It has drum brakes, but could I not throw a RD350 front end on it in the future for disc?
Both bikes are clean, but the 550 has small problems (no sidecovers, front brake needs bled, speedo doesn't work, needs rejetting, needs seatcover).
The Yamaha basically has no problems.
So what is your opinion? Should I definitely trade or is it realistically a dumb idea? I just want a Sunday rider bike to have fun on in the twisty mountain roads. Gas mileage is no concern.