You have to use the tap that comes with the Time Sert or Helicoil kit and those will contact the flywheel. Only a bottoming blind hole tap would work and I don't know if they're available in that size.
Disclaimer : Don't believe anything I say unless you are absolutely sure that I know what I'm talking about .
I have not taken it out yet,,, waiting untill I have a tuning issue and a new electronic ignition to put in,,,,, will see what it takes to fix it and hopefully never open it again for a long time,,,,the "k" rivet might work good thought !!!