Patric...very cool bike! I've spent the last few days studying this rare bike. Is it possible this is a Merkel built bike and not a Miami Cycle build? It doesn't have the Miami signature drop outs and the split bottom bracket. Yet it replicates the Flying Merkel motorcycle.
Joseph Merkel was among the most innovative of the pioneer motorcycle designers developing a patented spring front fork and the monoshock rear suspension, and your bike certainly has those winning characteristics; the rear mono spring, the sandwich bottom spring, the front spring actioned fork, plus that unique seat post...these all replicate the Merkel motorcycle!
"Miami Cycle Mfg. Co. began producing the Flying Merkel Motorcycle in 1911"
My research differs:
1900 Joseph Merkel started in the bicycle business manufacturing bicycle parts.
1901 Merkel began attaching small motors to the bicycles and the Merkel Motorcycle was born.
1902 Merkel set-up shop producing single cylinder motorcycles.
1905 Merkel engaged in competition and produced several racing machines.
1909 The company was purchased by the Light Manufacturing Company and moved to Pottstown Pennsylvania, producing machines with the "Merkel Light" and subsequently "The Flying Merkel".
1911 The Miami Cycle Manufacturing Company purchased Merkel, and transferred all operations to its Middletown, Ohio headquarters and continued building the Flying Merkel motorcycles and bicycles