G'day, Al.
I have until recently had a SR250 1982 mod (1982) and can say this is a bike that is bullet proof. Light and easy to ride with enough oomph to keep a newbie happy for a good while. With a decent muffler it even sounds the part. I could'nt kill mine, and the newbie who bought it reckons apart from the rattles which sound like a vigoruosly shaken tin of rusty nuts and bolts, it is still going strong. The only real mod I made to mine was using a 7" sealed beam off a car, so I could actually see at night, and a second hand muffler to replace the original rusted out one with the good sound.
Actually, the sealed beam was overkill, but was cheaper than the original globe. You dont need better lights, as it doesn't go fast enough to catch up with the beam anyway.