My Boyer on the Commando never let me down, but it did not agree with my 850. The engine was very jumpy just above idle, and stable idle was not a feature, up and down was. After I convinced myself it must be the Boyer advance curve, I splashed out on Pazon's Altair, I love the 2013 motor car style idle, smooth and stable. It is good fun to show this off to modern riders! A good manometer type carb balancer of eBay with a healthy engine, and it is GOLD.
Cheers Richard
Cheers Richard