| 摘要 |
A front and rear wheel drive motorcycle includes an engine unit (1) including a cylinder assembly (10) and a crank shaft (2) and first and second speed change belt mechanisms (3, 4) mounted to one end of the crank shaft (2) for driving the front and rear wheels (22, 17), respectively. The first and second speed change belt mechanisms (3, 4) are operatively connected to first and second speed change gear mechanisms (15, 20) through first and second driven pulleys (13, 18) respectively provided to the first and second speed change belt mechanisms (3, 4). To one end of the crank shaft (2) is mounted a driving pulley means (5, 6, 7) operated commonly with respect to the first and second speed change belt mechanisms (15, 20). The driving pulley means comprises a stationary driving pulley (5) mounted to one end of the crank shaft (2) and operated commonly with respect to the first and second speed change belt mechansims (15, 20) and a pair of movable driving pulleys (6, 7) mounted to one end of the crank shaft (2) with the stationary drinving pulley (5) interposed therebetween. |
