Hi Martin, the brake caliper is from a Royal Enfield scram/Himalayan. Malcolm has machined up a bracket to accommodate it to the original fork bolt holes. The disc is from a Honda 250 super dream, slightly larger in diameter but same hub pattern and offset as the RS. Both will be new items on the finished bike, along with a royal Enfield front master cylinder and brake lever. You can buy the whole shabang for around £110. The disc will be an EBC item, which from what I understand comes drilled, so hopefully aid braking a little 🤞
That’s the one thing on the standard bike that is definitely lacking. The front brake is hopeless 🙄
Cheers, Michael