A DOHC motor looks distinctly different from a SOHC motor. Here's a picture of a 1979 CB750 FZ: http://www.allenmuseum.com/cb7f.htm
The SOHC/4 website has the list of serial numbers and other information that will help you determine the vintage of this bike if it is a single cam 750: http://www.sohc4.net --Glenn Dick Seng wrote: > A friend has been given a CB750 which he thinks is a '73. I took a look >at it at his request but I'm not really up on 750's. > On the top of the heads are the letters DOC which I guess means Double >Overhead Cam. Right? > So, could this be a '73? > Both side covers are there and the right has what appears as an oil >filler cap. > Any info will be appreciated and if pics are requested, it might take a >day or two to get them as he's in the western part of the state, about 60 >miles from where I live. > >Thanks, > >Dick Seng >Ellington CT >SHOC4 #657 >1975 CB400F SS >N 41� 55.766 W 72� 26.618 >================================ > > > > >
