Ok here goes. I hope this posts. I crawled under the bike and upon inspection noticed the spark plug boot dangling, but I couldn’t see the plug. It took some figuring but you have to open the seat, locate the two 10mm bolts in front, remove them. The front under seat cover can then be popped off with a flat head screw driver. On the right angled to the front is the plug recessed in the engine cowling.There is NO other way to access it. I removed the plug, extension required, cleaned it, put the boot back on, fired right up. Covers and screws in reverse. I hope this doesn’t happen to anyone, how it came off is a mystery. But at least you now know how to access your plug.