From carb drops offline at idle
Sometimes (increasingly often) at idle the front carb does not do much. If I pull the front plugs there is no change in RPM. I can actually pull the rear plugs and the bike will idle on the front but at a much lower RPM than if I pull the two front plugs. It sounds like a carb sync issue except that it doesn't happen every time. In fact when I drop down to idle it will initially "stop" at the higher RPM typical of both cylinders firing then within a second or two further drop down to the RPM typical of the front cylinder not doing much.