Follow this link for the CB77 Float Settings.

The engine doesn't get up "on the cam" until it pass" well beyond 6000 rpm - although it will pull smoothly and with accounted strength down as far as 3000 rpm. The carburetors, one mounted on each of the intake ports, are just over an inch in throat diameter, which is nothing less than incredible for an engine of less thin 19 cubic inches in displacement. Even so, it is not particularly fussy: it responds well to big bites of throttle it low speeds and there is none of the medium-speed "surging" that sometimes afflicts engines having such oversized carburetors.

Transmission

Behind the engine, in the same casing and sharing the engine's lubricating oil, is the transmission. The drive is transmitted back by a single-row chain and through a multi-plate clutch running in an oil bath. The gears are arranged, in constant mesh, on parallel shafts and all speeds are "indirect." The drive goes in on the forward shaft, passes back, through whatever pair of gears is "selected" by the engagement dogs, and then to the rear "output" shaft. The efficiency of this layout is slightly lower than that of the "direct-top" transmission, in 4th gear; slightly higher in the intermediate gears. The arrangement is probably used by Honda because it fits well into their overall engine/drive package.