| 摘要 |
PROBLEM TO BE SOLVED: To arrange a shift cam at a prescribed position to cause a center of gravity of an engine to be positioned below and to stabilize a vehicle body and at the same time to perform a superior shifting operation.SOLUTION: A drive shaft 234 is arranged below a first plane F1 passing through an axis Lcr of a crank shaft 211 and an axis Lco of a counter shaft 231. A shift cam 244 is arranged above a horizontal plane Fh passing through an axis Ld of the drive shaft 234 and at the same time arranged in front of a second plane F2 in a vehicle width direction in parallel with a linear line Le connecting the vertical two points of suspension parts 210a, 210b and passing through the axis Ld of the drive shaft 234. |
