Lambretta Stepped Repair Stud 8mm to 7mm 17x7x12mm For Round Exhaust Ports MBP0430
This MB made stainless steel repair stud is for cylinders with round exhaust ports if the threads have gone bad.
Drill out the hole 6.9mm then tap out the the cylinder to 8 x 1.25mm
Loctite the stud in place
MBP0430