Put it in 6th and held the tire and that was enough to get it off. I need to clean the threads off now and try again. By a sheer stroke of luck, I stopped by a couple mechanic's places and they didn't have metric sized keys, but stopped by a guy I know's moped shop....specializing in Euro spec mopeds which no longer use keys for flywheels(70s tech) and asked him if he had any and he didn't think so, but after doing a little digging through his "sh*t pile", low and behold, there was an OEM spec Blaster woodruff key sitting there that he just gave me. I was about blown off my feet as that was just pure luck that he had one of those laying around to the same specs. I:I I'll have to try putting it all back together tomorrow.