The Honda CB125 was a 125 cc motorcycle made by Honda from 1971-1975. It had an overhead camshaft engine with a 9500 rpm redline.
There not being any competition for the CB125, it manages to get along with the same 125cc sohc Single, five-speed transmission and combination pressed steel and tube frame. There's no electric starting or tachometer or turn signal canceler or disc brakes. This is a very basic motorcycle.