used

 brass     amal     76 ( pepper pot ) Models. no 45

      jet block  

has a stop screw slot on r/h side !

=  1 “ bore

may need a better clean before use 

 bsa  triumph 

scott norton matchless pantherenfieldvelo  

will post worldwide  but please ask for price 

  ,  to fit triumph  triton tribsa BSA norton  sunbeam   PANTHER ARIEL AJS MATCHLESS velo  etc etc ,