as soon as I could after I turned 16 in 1993 I bought an RD50 not unlike this, except thrashed to within an inch, with a slashed up seat, dented tank and a centre stand that wouldn't, all for £250. It did have an aftermarket micron and my dad and I stripped and rebuilt the engine and sorted and painted it so it was a bit more presentable. It had no restrictions except the tiny capacity and after a fettle it would juuuust hit 60 with a tailwind. No actual pictures but it looked like a shit version of this.
When I turned 17 I then sold it to mate, for a loss obvs, and upgraded to this RD125LC bought from John Riley motorcycles in Crayford for, I think £500 or thereabouts.
The custom work was mostly as it was when I got it but I did add the handlebars, seat cowl, the belly pan and the micron (it had some even more antisocial race exhaust on it with a massive expansion chamber but basically no silencer which really annoyed the neighbours).
This also got an engine rebuild after it seized at about 70 on the A20 at Ruxley which was a real brown trousers moment and I also fell off right outside my school attempting to pull a wheelie which resulted in the dent in the tank and a fair amount of embarrassment.
A year later after I had dropped it a couple more times I scrabbled together enough to get the Renault 5 GTL Le Car in the picture below and it has been cars ever since. (the bumper was off being sprayed silver to match as they were ugly grey when this picture was taken. )
Naturally I now wish I'd kept them instead of selling them all for a loss but i did have a lot of fun.