Got this bike off ebay, hasn't arrived yet but what do you guys think?? Titled as a 60's Worksman but is missing front badge. Can anyone tell from sprocket design?? Seller did claim it was heavy duty built. Either way it's getting a motor. May have 24" wheels not sure. Engine companies say not to put an engine on anything smaller that a 26" is that not ok?? Seen motorized 20" Sting Ray's too though.