I have been thinking of getting a bike again for the
back roads. Years ago I had a Yamaha RD250 and
SR500

Honda Hawk 650GT from the late 80's is a nice small
V twin.

Stay away from the Suzuki 2 stroke triples and get a Yamaha
RD instead , if you want a 70's 2 stroke.

BMW twins
Yamaha XS650, XT500, SR500