SIL Mag Flange also known as the magneto flange or mag housing.
If you broke your mag flange on extraction, you need this!
Fits all S1-GP lambrettas except the TV1 but nothing does. If you own one, I assume you already know this...
Quality is as expected from SIL castings these days but thankfully it's covered by the fan shroud.
Does it job as it's intended and at an affordable price.
Made in India