Patent ID: 8245683

Claim:
A vehicle engine mounted on a body frame, comprising: a crankcase for supporting thereon a crankshaft, an input shaft of a transmission, and an output shaft, disposed on the rear side of said input shaft, of said transmission, said crankcase including a left case half and a right case half jointed to each other at a plane orthogonal to the axis of said crankshaft; a starter motor being mounted to an upper surface of the crankcase; a speed sensor, for detecting the vehicle speed from rotation of a gear in said transmission, being mounted to the upper surface of said crankcase; wherein said starter motor is disposed on a portion, directly above said input shaft of said upper surface of said crankcase, said speed sensor for detecting the rotation of a gear on said output shaft as the vehicle speed is disposed on a portion, directly above said output shaft, of said upper surface of said crankcase, and said crankcase is formed with a raised wall for covering one side surface of said speed sensor.