I have not used Total seal rings in my Norton, but I have used them in other mc engines with good success. A Cheney BSA with a B44 engine, and a BSA B44 Shooting Star, both engines sealed up well, use little to no oil and do not leak. I also replaced the rings in my BMW R75/6 it too sealed up well and uses very little oil. These ring sets use the two piece 2nd ring and three piece oil ring.
Ken G.