I know its not a BSA but just done a major engine build on a 1966 Triumph T120 Bonnie. Its cost a lot to do , now after 50easy miles its pouring fuel out of the left hand pot. stripped it down and found a crack in the head between chamber and rear bolt hole. due to funds Im looking for another head , it has been suggested to vee out the crack (may be two) and fill with ??? 200 aparently like solder but harder. in the mean time I need to get some miles on before summer is totally washed out.
hope someone has one lying about holding a door open