The 2-stroke Yamaha's are the same design that they have sold since the 80's. They used chrome rings, and a different needle after (96?) to get them to run on 100:1 mix (still no where near as clean as a 4 stroke).
I loved mine (it was a 100:1) and would probably ditch my new Tohatsu 4x6 for one. The problem is the only ones (if you can still find one) for sale in the US have been the short (15") shaft models favored for tender motors. I had a chance to buy one in the Abaco's and should have jumped on it.
Looks like they stopped even marketing the 15" model in the US now (it is no longer listed on the Yamaha USA site)... here is a link to it for the overseas market (same one they have sold for years).