Blimely an XS250! They looked rather like coffin tank RD250s but with a four stroke engine. Carb set up and starting could be a problem if memory serves. Anything from the 1970’s would be a clssic now, just by surviving that long!
Well, 2 years on from this post and I can safely say the XS250 is looking ratty still. Bad news is it fell over and into my new Fireblade. Ouch, £110 to repair the blade properly. Still love the old gal though.