Cool things with wheels since 2006
Puch 250 SGS my guess
It is a 1950s 2-stroke Puch SG 250 with a special 'double piston' system. It was sold by Sears in the US as 'Sears Allstate'. The later 1960s SGS version had a more angular design. http://nortonfastback.com/puch/images/blog_img/split-single_cut-away.jpg
Looks to me like an NSU 250 from the 1950,s
Puch SGS my guess
Looks like a Sears All-State made by Puch in Germany. Often called a 'Twingle' motor (twin piston single cylinder) it was two a stroke. From what I've heard, it could have been used for mosquito abatement as it was super smoky. Tons of grunt, was designed for a sidecar. This one appears to have the rare and desirable single seat configuration, most came with the long two person seat. Typical outstanding engineering, built like a tank. Super cool bike.
It is a Sears Split single Deluxe
It is a Austrian Puch SG250 or SG175 sold as a Sears Allstate in the US
I think it's a 1956 Sears Allstate 175cc two stroker.