I was the lucky winner of a Johnson Motor Wheel on eBay two months ago. It is totally complete an original down to the period of the headlight which they did not make but was purchased from independent vendors at that time. Selling them as battery kits. I also have the original Manual which is a huge help in verifying items of there kit. The bike is also a Johnson but from what I was told Johnson Motor Wheel did not make the bike. Other information on this unique engine can be had through google.  The little twin 2 cycle runs perfect & very smooth. Sounds like a Maytag but runs better, especially when starting these little gems. The cylinders are in line so the con rods are offset. I have had copies made of many different parts of the Kit. The exact year is hard to determine but a good guess from the way the exhaust is made having that little 2" tube added on horizontally puts it at 1919 or1920. The bike has been painted & was originally black. The gas tank was originally black with gold decals on both side. Dave Bagne Hutchinson Minn.