Unknown Engine

[ChrisMac]

Just got this today at NO CHARGE. Was found in a barn with a Sears bicycle. Friend wanted the bike but gave me the engine. Looking at the bracket, must've been on the bike and ran the front tire, I think. Anyone out in the RRB world seen one like this or can give me any info?

Thanks in advance.......

 

[outskirtscustoms]

Kinda looks like an old chainsaw motor. Commonly used to motorize bikes.