In pre-Instagram days, when there was far less info, fewer outlets, less stimuli, the Sideburn blog would often post a random photo of a bike we found, even if we didn't know a lot about it. In the Instagram age people have made whole careers and lifestyles out of posting photos they know bugger all about and had nothing to do with.
Anyway, Japanese chap Noboru Suwa sent us a photo of this Yamaha RD250 street tracker and it was too nice not to share, even though I don't have any details on it. I'm pretty sure M and M's Motorcycles had a hand in building it. M and M's were featured back in Sideburn 6.