it looks similar to a s-32,it is aircooled, and it has underpipes, drum brakes. im gonna take a poke at late 50's to late 60's it dosent have coil shocks on the rear just weird chrome ones, if i can dig out the pics i once took of them ill surely post them, sorry for the lack of info tho.....its sitting in my grandpas garage but it was there when he moved in along with a parts bike triple gt750 i believe. the tank looks to be once green with a black frame. no badges or anything at this point. it has a snapped rod and missing cylinder but it would be a nice project to collect parts for over the years. obviously its pretty rare seeing how i cannot for the life of me find any early suzukis with 4 cylinder 2 strokes other than racers which this definatly is not.