Amal premiere

I have a Norton Roadster Mk2a 1974 850 cc
I will buy 2 new Amal premier carburetors .
I have new exhaust pipes without the crossover pipe . Stock mufflers .
Will the standard jetting be ok ?

Michael

Mine came with 260 Mains, no signs of too lean, nor too rich at WOT, carburets clean everywhere else.

I run 260 mains with peashooter silencers on non Xover pipes, 850MK2A.