"... The five-speed transmission is hefty and the size of its gearsets appear well up to handling the CB750's maximum rated torque (44.12 lb.-ft. at 7000 rpm). In basic design, it differs only slightly from previous Honda practice. Where the shifting drum, in other models, acts as fork carrier, it is used only for locating the forks in the 750. The forks actually pivot on two large pins. The seven clutch plates are of a semi-neoprene material; Honda has used metal plates but found them troublesome. Provision for automatic final drive chain oiling is made through the drive sprocket; oil passes through a drillway in the shaft and is thrown out onto the sprocket by centrifugal force. There is an extra shaft in the transmission - a transfer shaft, which picks up power from the countershaft to deliver it to the final drive chain. ..."
(Quelle)