OMG, A TAPEDECK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

A good friend of mine had one of those but it was the 750cc model.
Solid bike, bulletproof, hard to start (like ALL old-tech yamahas),
VERY heavy but amazing in the open road and yours seems to
be in mint shape.
This particular bike with 30k+ miles on it was in my garage more
times than I can remember for different reasons like washing,
maintenance or repairs (60% it was the darn electric system and
30% the carburetor intake seals).
*
TIP, to start this bike easiest: do nothing but "pump" the kick starter 10-15 times before
turning on the ignition key start, this will pump a bit of oil
everywhere in the engine, valves and cylinders and making
starting it MUCH easier.
** Do not abuse the CHOKE, these carburetors flood very easy
and foul your sparkplugs and then you cannot get a spark
anymore.
*** Never leave the choke on on ANY bike for more than 20-30 secs.
Great bike & good luck.

Oh, and GET NEW TIRES for it, ASAP!