I don't usually comment on carbs because I have been rubbish at setting them up but I have Mikuni's on my Norvin and Mk 1 Concentrics on my "C" twin and Norton Atlas, altering the settings on a concentric is relatively easy and have now got them something like but there seems to me to be an extra layer of complexity with the Mikuni because of the many different needles and I'm reluctant to even touch them.
If I was fitting new carbs I would try the Premiers because they seem to me to be even easier to adjust and now having overcome the rapid wear problem an even better option.
A question for Mikuni users, what are yours like for starting, the Norvin always has needed three or four kicks (it did when I had Amal MK2s on as well and it's on coil ignition) whereas the "C" twin with the MK1s and BTH mag once tickled starts first kick, the Norton's the same.
If I was fitting new carbs I would try the Premiers because they seem to me to be even easier to adjust and now having overcome the rapid wear problem an even better option.
A question for Mikuni users, what are yours like for starting, the Norvin always has needed three or four kicks (it did when I had Amal MK2s on as well and it's on coil ignition) whereas the "C" twin with the MK1s and BTH mag once tickled starts first kick, the Norton's the same.