FCR Carburetor Tuning - Slightly rich or too rich. It's best to keep it at a slightly rich level....
Regarding the tuning of the FCR carburetor on the CBX1000, my recent trend has been to tune it to a slightly rich setting. If the optimal air-fuel ratio is 12.5, I aim for around 12.0, considering that the mixture might lean out when the throttle is opened.