O-3125
![S3 Beta Cylinder Head Insert O-Ring](http://shopbetamotorcycle.com/cdn/shop/products/Beta10-66164-000_{width}x.jpg?v=1652921502)
Original S3 Parts o-ring sealing the head insert to shell on all Beta head kits and many others.
S3 Beta Cylinder Head Insert O-Ring
Produced by S3 Parts of Spain
S3 Beta Cylinder Head Insert O-Ring
Produced by S3 Parts of Spain