Welcome Kymco Owners!
What is the gadget used to create the threads?
Called a tapper I believe?
A "die" makes external threads.The fix for stripped threads on the crank shaft extension (which mounts the front pulley vario) was building up with weld, running engine to file the end to right O.D. then threading with a die.
You’re right of course Karl, how did I forget that?!