Mikuni carb

Any advice on switching from 2 amals to one mikuni on 1973 750 commando

My opinion is don't, Amal carbies are so simple, I don't know why people have so much troubles with Amal carbs, they do need to be maintained same as any other carbie, yes things wear, depends on how many mile you ride a year, how you ride your bike but going single carb you lose a lot of performance, over the 50 years of owning my Norton I gone down the road of changing the carbs on it but in the long run I have gone back to my old Amals and have found my Norton runs so much better with them, my 850 motor isn't stock built for the Featherbed frame, cam and head work, the Amals are jetted right for my motor performance and with the Joe Hunt magneto it starts first kick every time whether cold or hot, they are easy to maintain, easy to tune and I am no tuning expert but I do know my own bike.
But of course everyone is different and ride differently to how I ride, but if I was going to go down the road of new carbs a set of premier Amals be the go and they look better as well, tuned right they are a reliable carbie, simple to work on, jetted right for your motor and if timing is set right will be a one kick starter every time.
Pay a bit more and put on a set of Premier Amals and your Norton will love you for it, this is of course my opinion.

Ashley

The Amal premiers are way better than the old ones. And they look the part on Nortons. The downside is PRICE. And the need to synch them up and stay on top of them.
A single Mikuni is easy to start, just set them on fast idle, may or may not use the choke, and give it a good kick.
You will probably have to remove the ham can filter and make a new position for the key switch. Someone, somewhere, makes aham can to solve this problem.