Abstract: This V-type engine has first and second banks of cylinders, each odd in number, with first intake and exhaust cam shafts provided along the first cylinder head and second intake and exhaust cam shafts provided along the second cylinder head. One of the first intake and exhaust cam shafts, and one of the second intake and exhaust cam shafts, is rotationally driven from the crank shaft. A first intake cam shaft gear wheel is provided on the first intake cam shaft at a longitudinal position between the middle cylinder of the first bank of cylinders and the next cylinder to the rear from the middle cylinder, and a first exhaust cam shaft gear wheel, meshed with this first intake cam shaft gear wheel, is provided on the first exhaust cam shaft at a similar longitudinal position between the middle cylinder of the first bank of cylinders and the next cylinder to the rear therefrom.

Abstract: A timing adjustment mechanism in a wrapping connector driving device includes a first pulley fixedly mounted on a first revolving shaft; a second pulley fixedly mounted on a second revolving shaft, the second pulley tightly fitting on the second shaft and being seated on an end surface of the second shaft; an intermediary wrapping connector wound on the first and second pulleys and extending therebetween; an idle pulley lever swingable about the axis of rotation of the second revolving shaft; a first idle pulley disposed near the second pulley on the tension side of the intermediary wrapping connector and rotatably secured to one end of said pulley holding lever; and an idle pulley rotatably secured to the other end of said pulley holding lever near said second pulley on the slack side of said intermediary wrapping connector, wherein all of the central portions of swing of the first and second pulleys, the tension and slack side pulleys and the pulley holding lever lie in the same plane.