Lambretta Stepped Repair Stud 12mm to 8mm for Crankcase Side Exhaust Swan Neck MBP0393

This is a Stainless Steel super over sized stepped repair stud from 12mm to 8mm to repair a damaged crankcase side 8mm thread that has been over tapped out. 
If the thread has gone bad and is too big to fit a Timesert or helicoil, here is a simple way to repair the casing.  Drill the casing to 10.7mm then tap out the casing to 12 x 1.5mm to the correct depth then loctite and screw the stud into place.
This is a much cheaper stronger repair.