I have a 1972 reg ST70. Stored since 1974 with 900miles recorded.
Oil change, new plug, new air filter, points and valve clearances adjusted, new rectifier diode and battery (duff).
I've had it just over a year now, have done over 500 miles on it and it's never missed a beat. I did run out of petrol a couple of times though due to the tiny fuel tank.
I love it - if anything ever happened to it, I'd get another. It's perfect for commuting and local trips.
A real 100 mpg, no tax / MOT, ULEZ exemption and £100 insurance. It was, and still is - the future.
The only downside really is that idiot hipsters on 'vintage' scooters think it's appropriate to wave at me and give thumbs up signs.
I return a middle finger to these t*ssers.