Now that is impressive. Who designed that was definitely not fooling around.I picked up this one at a garage sale.
That's what I did, then noticed the derivatives that appear to be based on the thickness of the leaves used.quite a few listed in ebay - search cf71
I bought this gauge based on your location. A proper .18 gauge is not easy to find. I thought, how big a deal could it be as most gauges start at .20. I recently put some new NGK B7ES gapped with my old tool to .20 in my new to me 49 Series B. Not great on the starting, but flooding the engine probably did not help. Today, I replaced the plugs having gapped them to .18. Bike started first kick and it rode like a dream. I am dumbfounded by how big a difference .02 can really be. Its all a game of inchesI found this: https://www.napaonline.com/en/p/BK_7769145?keywordInput=bk+7769145
Thanks for the suggestions.