Motorcycle Repair: harley Spark Plug Thread Repair, spark plug thread repair, harley shovel head

Question
what is the best way to fix a Harley shovel head Spark Plug hole the rear cylinder has a heli-coil in it now and it weeps a little i would rather put in some kind of an insert rather than another heli-coil it's had 3 so far and the all eventually go bad

Answer
I use stainless steel thread repair inserts. You hae to drill out the hole and install the insert. the insert has 3-4 pins that stick out. Once the insert is in then the pins are driven into the threads, so it will never come out.
You can find them at WW Grainger
Good luck and happy riding
Mike