Topic: 1976 CB750 Carburetor Sysc

[John G]

Is there a non adjustable carb on the 1976 CB750 or do you just adjust all of them while using a synchronizer tool?

[newday777]

No not until 1977 with the PD Carbs. Roundtops have 4 adjustable.

[HondaMan]

The "baseline" carb has always been specified (and works as) #2. Even the old Honda manuals (that showed how to do it) stated to leave #2 as the starting point, adjusting the others to it accordingly. In the early 750 it was cheaper to leave the molds alone for all of the carbs: in the 1977 versions the US DOT forced Honda to make it impossible to "misadjust" the baseline carb during carb-sync operations. That's when the unadjustable #2 carbs first appeared.

[PeWe]

One fixed carb make it impossible to bench sync all too high ending up in a too high idle and do it again, properly.