I've just bought a Honda CB125t, I think it's mid-to-late 70's. It has a modified front brake fitted but it wasn't done right and it is now no good (a weld has cracked). Does anyone know what would fit? eg any early Honda CB 125-250? It has a single disc.

Also, I'm about to re-vin the bike, will I need the exact same brake set-up as it came with to pass the WoF check?

Thanks... any help would be appreciated!